60 GHz millimeter wave(mmWave)system provides extremely high time resolution and multipath components(MPC)separation and has great potential to achieve high precision in the indoor positioning.However,the ranging data...60 GHz millimeter wave(mmWave)system provides extremely high time resolution and multipath components(MPC)separation and has great potential to achieve high precision in the indoor positioning.However,the ranging data is often contaminated by non-line-of-sight(NLOS)transmission.First,six features of 60GHz mm Wave signal under LOS and NLOS conditions are evaluated.Next,a classifier constructed by random forest(RF)algorithm is used to identify line-of-sight(LOS)or NLOS channel.The identification mechanism has excellent generalization performance and the classification accuracy is over 97%.Finally,based on the identification results,a residual weighted least squares positioning method is proposed.All ranging information including that under NLOS channels is fully utilized,positioning failure caused by insufficient LOS links can be avoided.Compared with the conventional least squares approach,the positioning error of the proposed algorithm is reduced by 49%.展开更多
In this paper performance of three different designs of a 60 GHz highgain antenna for body-centric communication has been evaluated. The basic structure of the antenna is a slotted patch consisting of a rectangular ri...In this paper performance of three different designs of a 60 GHz highgain antenna for body-centric communication has been evaluated. The basic structure of the antenna is a slotted patch consisting of a rectangular ring radiator withpassive radiators inside. The variation of the design was done by changing theshape of these passive radiators. For free space performance, two types of excitations were used—waveguide port and a coaxial probe. The coaxial probe signifi-cantly improved both the bandwidth and radiation efficiency. The centerfrequency of all the designs was close to 60 GHz with a bandwidth of more than5 GHz. These designs achieved a maximum gain of 8.47 dB, 10 dB, and 9.73 dBwhile the radiation efficiency was around 94%. For body-centric applications,these antennas were simulated at two different distances from a human torsophantom using a coaxial probe. The torso phantom was modeled by taking threelayers of the human body—skin, fat, and muscle. Millimeter waves have lowpenetration depth in the human body as a result antenna performance is lessaffected. A negligible shift of return loss curves was observed. Radiation efficiencies dropped at the closest distance to the phantom and at the furthest distance, theefficiencies increased to free space values. On the three layers human body phantom, all three different antenna designs show directive radiation patterns towards offthe body. All three designs exhibited similar results in terms of center frequency andefficiency but varied slightly by either having better bandwidth or maximum gain.展开更多
A 60 GHz phased array system for mm wave frequency in 5G is introduced and a 5 bit digitally controlled phase shifter in 40 nm CMOS technology is presented.In a phased array system,the signal to noise ratio(SNR)of the...A 60 GHz phased array system for mm wave frequency in 5G is introduced and a 5 bit digitally controlled phase shifter in 40 nm CMOS technology is presented.In a phased array system,the signal to noise ratio(SNR)of the receiver is improved with the beaming forming function.Therefore,the communication data rate and distance are improved accordingly.The phase shifter is the key component for achieving the beam forming function,and its resolution and power consumption are also very critical.In the second half of this paper,an analysis of phase shifter is introduced,and a 60 GHz 5 bit digitally controlled phase shifter in 40 nm complementary metal oxide semiconductor(CMOS)technology is presented.In this presented phase shifter,a hybrid structure is implemented for its advantage on lower phase deviation while keeping comparable loss.Meanwhile,this digitally controlled phase shifter is much more compact than other works.For all 32 states,the minimum phase error is 1.5°,and the maximum phase error is 6.8°.The measured insertion loss is-20.9±1 dB including pad loss at 60 GHz and the return loss is more than 10 dB over 57-64 GHz.The total chip size is 0.24 mm^2 with 0 mW DC power consumption.展开更多
This paper reviews the state-of-the-art filter designs for 60 GHz applications. The most promising filter solutions at this frequency include fiher-in-package where the filter itself is design in the packaging platfor...This paper reviews the state-of-the-art filter designs for 60 GHz applications. The most promising filter solutions at this frequency include fiher-in-package where the filter itself is design in the packaging platform and filter-on-chip which is an on-chip filter co-design for miniaturized system size with low packaging cost. Design methodology, design technology, key performance parameters, similarities and dift）rences, advantages and drawbacks, and future trends are explored and studied. Filters in the printed circuit board （PCB）, low temperature co-fired ceramics （LTCC）, organie material, and bipolar complementary metal oxide semicomtuctor （BiCMOS） chips are summarized and compared in details. Future design trends and challenges are also given after the review.展开更多
This paper proposes low-power high-efficiency multi-gigabit 60 GHz transceiver systems for short-range communications. 60 GHz muhi-gigabit on-off keying （OOK） receiver system-in-package （SIP） module is developed u...This paper proposes low-power high-efficiency multi-gigabit 60 GHz transceiver systems for short-range communications. 60 GHz muhi-gigabit on-off keying （OOK） receiver system-in-package （SIP） module is developed using a low temperature co-fired ceramic （LTCC） technology. Integrated with a low-power complementary metal oxide semiconductor （CMOS） OOK demodulator, the LTCC receiver module demonstrates Full-HD uncompressed video streaming at a distance of 1 m. A low-power and high-efficiency fully integrated OOK transceiver is also developed to be integrated in a handheld device. The transceiver consumes 67 mW at 10.7 Gb/ s and occupies an active footprint of 0.44 mm^2. With an on-board Yagi-Uda antenna, the transceiver achieves 10.7 Gb/s of data transmission, resulting in a high energy efficiency of 6.26 pJ/bit. The antenna-in-package module with the transceiver demon- strates mobile-to-display 1080p Full-HD video transmission over a distance of 60 cm.展开更多
In this paper,the feasibility and performance of millimeter wave(mm Wave)60 GHz ultra-wide band(UWB)systems for gigabit machine-to-machine(M2M)communications are analyzed.Specifically,based on specifications,channel m...In this paper,the feasibility and performance of millimeter wave(mm Wave)60 GHz ultra-wide band(UWB)systems for gigabit machine-to-machine(M2M)communications are analyzed.Specifically,based on specifications,channel measurements and models for both line-of-sight(LOS)and non-LOS(NLOS)scenarios,60 GHz propagation mechanisms are summarized,and 60 GHz UWB link budget and performance are analyzed.Tests are performed for determining ranges and antenna configurations.Results show that gigabit capacity can be achieved with omni-directional antennas configuration at the transceiver,especially in LOS conditions.When the LOS path is blocked by a moving person or by radiowave propagation in the NLOS situation,omni-directional and directional antennas configuration at the transceiver is required,especially for a larger range between machines in office rooms.Therefore,it is essential to keep a clear LOS path in M2M applications like gigabit data transfer.The goal of this work is to provide useful information for standardizations and design of 60 GHz UWB systems.展开更多
基金supported by National Natural Science Foundation of China(No.62101298)Collaborative Education Project between Industry and Academia,China(22050609312501)。
文摘60 GHz millimeter wave(mmWave)system provides extremely high time resolution and multipath components(MPC)separation and has great potential to achieve high precision in the indoor positioning.However,the ranging data is often contaminated by non-line-of-sight(NLOS)transmission.First,six features of 60GHz mm Wave signal under LOS and NLOS conditions are evaluated.Next,a classifier constructed by random forest(RF)algorithm is used to identify line-of-sight(LOS)or NLOS channel.The identification mechanism has excellent generalization performance and the classification accuracy is over 97%.Finally,based on the identification results,a residual weighted least squares positioning method is proposed.All ranging information including that under NLOS channels is fully utilized,positioning failure caused by insufficient LOS links can be avoided.Compared with the conventional least squares approach,the positioning error of the proposed algorithm is reduced by 49%.
文摘In this paper performance of three different designs of a 60 GHz highgain antenna for body-centric communication has been evaluated. The basic structure of the antenna is a slotted patch consisting of a rectangular ring radiator withpassive radiators inside. The variation of the design was done by changing theshape of these passive radiators. For free space performance, two types of excitations were used—waveguide port and a coaxial probe. The coaxial probe signifi-cantly improved both the bandwidth and radiation efficiency. The centerfrequency of all the designs was close to 60 GHz with a bandwidth of more than5 GHz. These designs achieved a maximum gain of 8.47 dB, 10 dB, and 9.73 dBwhile the radiation efficiency was around 94%. For body-centric applications,these antennas were simulated at two different distances from a human torsophantom using a coaxial probe. The torso phantom was modeled by taking threelayers of the human body—skin, fat, and muscle. Millimeter waves have lowpenetration depth in the human body as a result antenna performance is lessaffected. A negligible shift of return loss curves was observed. Radiation efficiencies dropped at the closest distance to the phantom and at the furthest distance, theefficiencies increased to free space values. On the three layers human body phantom, all three different antenna designs show directive radiation patterns towards offthe body. All three designs exhibited similar results in terms of center frequency andefficiency but varied slightly by either having better bandwidth or maximum gain.
基金supported by the National Science Foundation of China (No. 61828401)
文摘A 60 GHz phased array system for mm wave frequency in 5G is introduced and a 5 bit digitally controlled phase shifter in 40 nm CMOS technology is presented.In a phased array system,the signal to noise ratio(SNR)of the receiver is improved with the beaming forming function.Therefore,the communication data rate and distance are improved accordingly.The phase shifter is the key component for achieving the beam forming function,and its resolution and power consumption are also very critical.In the second half of this paper,an analysis of phase shifter is introduced,and a 60 GHz 5 bit digitally controlled phase shifter in 40 nm complementary metal oxide semiconductor(CMOS)technology is presented.In this presented phase shifter,a hybrid structure is implemented for its advantage on lower phase deviation while keeping comparable loss.Meanwhile,this digitally controlled phase shifter is much more compact than other works.For all 32 states,the minimum phase error is 1.5°,and the maximum phase error is 6.8°.The measured insertion loss is-20.9±1 dB including pad loss at 60 GHz and the return loss is more than 10 dB over 57-64 GHz.The total chip size is 0.24 mm^2 with 0 mW DC power consumption.
文摘This paper reviews the state-of-the-art filter designs for 60 GHz applications. The most promising filter solutions at this frequency include fiher-in-package where the filter itself is design in the packaging platform and filter-on-chip which is an on-chip filter co-design for miniaturized system size with low packaging cost. Design methodology, design technology, key performance parameters, similarities and dift）rences, advantages and drawbacks, and future trends are explored and studied. Filters in the printed circuit board （PCB）, low temperature co-fired ceramics （LTCC）, organie material, and bipolar complementary metal oxide semicomtuctor （BiCMOS） chips are summarized and compared in details. Future design trends and challenges are also given after the review.
文摘This paper proposes low-power high-efficiency multi-gigabit 60 GHz transceiver systems for short-range communications. 60 GHz muhi-gigabit on-off keying （OOK） receiver system-in-package （SIP） module is developed using a low temperature co-fired ceramic （LTCC） technology. Integrated with a low-power complementary metal oxide semiconductor （CMOS） OOK demodulator, the LTCC receiver module demonstrates Full-HD uncompressed video streaming at a distance of 1 m. A low-power and high-efficiency fully integrated OOK transceiver is also developed to be integrated in a handheld device. The transceiver consumes 67 mW at 10.7 Gb/ s and occupies an active footprint of 0.44 mm^2. With an on-board Yagi-Uda antenna, the transceiver achieves 10.7 Gb/s of data transmission, resulting in a high energy efficiency of 6.26 pJ/bit. The antenna-in-package module with the transceiver demon- strates mobile-to-display 1080p Full-HD video transmission over a distance of 60 cm.
基金supported by the State Key Laboratory of Millimeter Waves,Southeast University,China under grant No.K201517supported by the Fundamental Research Funds for the Central Universities under Grant No.2015 XS19.
文摘In this paper,the feasibility and performance of millimeter wave(mm Wave)60 GHz ultra-wide band(UWB)systems for gigabit machine-to-machine(M2M)communications are analyzed.Specifically,based on specifications,channel measurements and models for both line-of-sight(LOS)and non-LOS(NLOS)scenarios,60 GHz propagation mechanisms are summarized,and 60 GHz UWB link budget and performance are analyzed.Tests are performed for determining ranges and antenna configurations.Results show that gigabit capacity can be achieved with omni-directional antennas configuration at the transceiver,especially in LOS conditions.When the LOS path is blocked by a moving person or by radiowave propagation in the NLOS situation,omni-directional and directional antennas configuration at the transceiver is required,especially for a larger range between machines in office rooms.Therefore,it is essential to keep a clear LOS path in M2M applications like gigabit data transfer.The goal of this work is to provide useful information for standardizations and design of 60 GHz UWB systems.
文摘针对5G热点高容量场景下的60 GHz脉冲无线通信系统中信号幅度衰落引起的误码问题,研究了该系统中Raptor码的误码性能。根据60 GHz短距离通信系统特点,采用IEEE 802.15.3c工作组建立的60 GHz无线信道模型,在此基础上分析了编码系统接收信噪比;然后结合信道编码理论,对不同编码方案进行误码性能仿真,重点对两种不同的Raptor码的编码增益、译码开销及通信距离进行对比。研究结果表明,采用1/2码率的QCLDPC预编码的Raptor码在接收信噪比大约为5 d B时,相较于未编码系统拥有4.5 d B的编码增益,同时最大通信距离为70 m,为未来5G高频新空口热点高容量场景下的60GHz短距离通信系统信道编码提供技术参考。
