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1. 发明授权

US10979117B2 Method, system and apparatus for beam forming in a radio frequency transceiver with reduced complexity 有权
公开(公告)号：US10979117B2
公开(公告)日：2021-04-13
申请号：US16540416
申请日：2019-08-14
申请人： MMRFIC Technology Pvt. Ltd.
发明人： Ganesan Thiagarajan , Saravanakumar Ganeshan
IPC分类号： H04B7/06 , H01Q3/30 , H04B7/08 , H04B1/40
摘要： A radio frequency receiver comprises a plurality of receiving antennas providing a plurality of radio frequency (RF) signals, a first set of phase shifters providing a first set of analog beams from a first set of RF signals in the plurality of RF signals, a second set of phase shifters providing second set of analog beams from a second set of RF signals and a digital beamformer providing final set of beams employing the first set of analog beams and the second set of analog beams. Similarly a radio frequency transmitter comprises a digital beamformer providing a plurality of digital beams, a first set of splitter splitting a first set of digital beams in the plurality of digital beams into first set of analog beams, a second set splitter splitting a second set of digital beams in the plurality of digital beams into second set of analog beams, a first set of phase shifters providing a first set of analog beams, a second set of phase shifters providing second set of analog beams, a set of adder adding the first of analog beams and second set of analog beams to form the set of RF signals.

2. 发明申请

US20190123944A1 Method and System Providing Fourier Transform Based Signal Processing with Reduced Computational Complexity 审中-公开
公开(公告)号：US20190123944A1
公开(公告)日：2019-04-25
申请号：US16163824
申请日：2018-10-18
申请人： MMRFIC Technology Pvt. Ltd.
发明人： Ganesan Thiagarajan
IPC分类号： H04L27/22 , G06F17/14 , H04L27/26
摘要： According to an aspect of the present invention, a signal processor comprises an N-point phase FFT transformer operative to perform a FFT like transformation according to a first relation Y  [ k ] = ∑ n = 0 n = N - 1   exp [ j   angle  [ x  ( n ) ] ] * exp  [ - j   2  π   kn N ] , wherein angle [x(n)] representing the phase of the signal x(n). In that, a plurality of butterfly units with each butterfly unit in the plurality of butterfly units comprises an adder, subtractor and a multiplier, wherein the adder, the subtractor and multiplier receive a phase only signals with a signal amplitude less than unity. The butterfly units are arranged in plurality of stages to perform the operation as in the first relation.

3. 发明授权

US10038586B2 Method and system for preamble detection in a baseband modulated digital communication system 有权
公开(公告)号：US10038586B2
公开(公告)日：2018-07-31
申请号：US15442624
申请日：2017-02-25
申请人： MMRFIC Technology Pvt. Ltd.
发明人： Ganesan Thiagarajan , Saravanakumar Ganeshan
IPC分类号： H04L27/10 , H04L27/18 , H04L27/36 , H04L25/02 , H04L27/12
CPC分类号： H04L27/36 , H04L7/042 , H04L25/02 , H04L27/12
摘要： According to an aspect of the present disclosure, a method in a digital communication system comprising, receiving a first data packet comprising a set of preamble bits for transmission, selecting a first modulation parameter in relation with a first bit sequence property of the first data packet, modulating a carrier signal with the first modulation parameter to generate a first baseband signal embedding information in the data packet, receiving a second baseband signal at a receiver, performing correlation of the second baseband signal and a reference baseband signal to generate a correlation result and demodulating the second baseband signal to form a received bits when the correlation result peaks above a threshold value.

4. 发明申请

US20210281358A1 Method, System and Apparatus for Time and Frequency Synchronization for High Speed Moving Platforms 有权
公开(公告)号：US20210281358A1
公开(公告)日：2021-09-09
申请号：US17194314
申请日：2021-03-08
申请人： MMRFIC Technology Pvt. Ltd.
发明人： Ganesan Thiagarajan
IPC分类号： H04L1/00 , H04B7/0413 , H04B1/06
摘要： According to an aspect, a method in a wireless communication receiver comprises receiving a radio frequency (RF) signal, delaying the RF signal with a set of time delays, shifting the RF signal with a set of offset frequencies, compressing in time the RF signal with a set of compression factors, correlating the RF signal after subjecting to said delaying, shifting and compressing in time with a reference signal, and selecting a first delay, first offset frequency, and first compression ratio that corresponds to a peak resulting from said correlating, wherein the said first delay, first offset frequency, and first compression ration representing the difference between the RF signal and the reference signal.

5. 发明授权

US11121787B2 Method, system and apparatus for calibration of phased array radio frequency transceiver 有权
公开(公告)号：US11121787B2
公开(公告)日：2021-09-14
申请号：US16568285
申请日：2019-09-12
申请人： MMRFIC Technology Pvt. Ltd.
发明人： Ganesan Thiagarajan , Saravanakumar Ganeshan
IPC分类号： H04B17/364 , H04L12/26 , H04B17/10
摘要： A method of determining a total delay to a radio frequency (RF) signal caused by a path between a start point and an end point comprising, injecting a plurality of frequency tones at the start point, wherein the frequency tones are of different frequency, receiving the plurality of frequency tones at the end point, measuring a plurality phase differences corresponding to difference of phase between the plurality of frequency tones injected at the start point and the corresponding plurality of the frequency tones received at the end point, and determining a total delay to the RF signal caused by the path from at least more than one of the plurality of phase differences measured. The method further comprises determining a total phase shift to the RF signal from the total delay and a frequency of the RF signal.

6. 发明申请

US20200083972A1 Method, System and Apparatus for Calibration of Phased Array Radio Frequency Transceiver 审中-公开
公开(公告)号：US20200083972A1
公开(公告)日：2020-03-12
申请号：US16568285
申请日：2019-09-12
申请人： MMRFIC Technology Pvt. Ltd.
发明人： Ganesan Thiagarajan , Saravanakumar Ganeshan
IPC分类号： H04B17/364 , H04B17/10 , H04L12/26
摘要： A method of determining a total delay to a radio frequency (RF) signal caused by a path between a start point and an end point comprising, injecting a plurality of frequency tones at the start point, wherein the frequency tones are of different frequency, receiving the plurality of frequency tones at the end point, measuring a plurality phase differences corresponding to difference of phase between the plurality of frequency tones injected at the start point and the corresponding plurality of the frequency tones received at the end point, and determining a total delay to the RF signal caused by the path from at least more than one of the plurality of phase differences measured. The method further comprises determining a total phase shift to the RF signal from the total delay and a frequency of the RF signal.

7. 发明申请

US20180337805A1 Recursive Difference Filter Realization of Digital Filters 审中-公开
公开(公告)号：US20180337805A1
公开(公告)日：2018-11-22
申请号：US15678146
申请日：2017-08-16
申请人： MMRFIC Technology Pvt. Ltd.
发明人： Ganesan Thiagarajan
IPC分类号： H04L25/03
CPC分类号： H04L25/03076
摘要： According to an aspect of the present disclosure, a method comprises computing first set of coefficients of a digital filter providing first filter performance, computing a second set of coefficients from the first set of coefficients, forming a difference digital filter with second set of coefficients to produce a difference filter output and adding a compensation factor to the difference filter output to achieve a second performance identical to the first filter performance. According to another aspect, the second set of coefficients are computed as difference between the successive first set of coefficients such that when the first set of coefficients comprises N number of coefficients, the second set of coefficients comprises N−1 number of coefficients. The method further comprises computing first set of coefficients according to a first relation, computing the second set of coefficients according to a second relation, generating the difference filter output in accordance with a third relation, computing a compensation factor in accordance with a fourth relation and generating a filtered output samples from a set of input samples in accordance with a fifth relation.

8. 发明申请

US20180152334A1 Method and System for Preamble Detection in a Baseband Modulated Digital Communication System 审中-公开
公开(公告)号：US20180152334A1
公开(公告)日：2018-05-31
申请号：US15442624
申请日：2017-02-25
申请人： MMRFIC Technology Pvt. Ltd.
发明人： Ganesan Thiagarajan , Saravanakumar Ganeshan
IPC分类号： H04L27/36 , H04L25/02 , H04L27/12
CPC分类号： H04L27/36 , H04L25/02 , H04L27/12
摘要： According to an aspect of the present disclosure, a method in a digital communication system comprising, receiving a first data packet comprising a set of preamble bits for transmission, selecting a first modulation parameter in relation with a first bit sequence property of the first data packet, modulating a carrier signal with the first modulation parameter to generate a first baseband signal embedding information in the data packet, receiving a second baseband signal at a receiver, performing correlation of the second baseband signal and a reference baseband signal to generate a correlation result and demodulating the second baseband signal to form a received bits when the correlation result peaks above a threshold value.

9. 发明授权

US11609306B2 System, method and device for efficient processing of FMCW radar signals in a radar receiver 有权
公开(公告)号：US11609306B2
公开(公告)日：2023-03-21
申请号：US17074995
申请日：2020-10-20
申请人： MMRFIC Technology Pvt. Ltd.
发明人： Ganesan Thiagarajan
IPC分类号： G01S7/40
摘要： According to an aspect, method in a radar receiver system comprising, receiving a radar signal reflected from a target on a plurality of antennas, wherein the radar signal is a frequency modulated continuous wave (FMCW) signal comprising plurality of chirps, extracting a plurality of range bins from the radar signal, generating a plurality of reference angles and a plurality of reference velocities from a plurality of reference parameters, determining a plurality of reference weights from the plurality of reference angles and plurality of reference velocities, filtering the radar signal with the filter weights set to equal to the plurality of reference weights.

10. 发明申请

US20220182117A1 Optimal Hybrid Beamformer in a Multi Antenna Wireless Systems 有权
公开(公告)号：US20220182117A1
公开(公告)日：2022-06-09
申请号：US17543754
申请日：2021-12-07
申请人： MMRFIC Technology Pvt. Ltd.
发明人： Ganesan Thiagarajan , Sanjeev Gurugopinath
IPC分类号： H04B7/06
摘要： A radio frequency receiver comprises a set of antennas for receiving an RF signal over a communication channel represented by a channel matrix Hd, a plurality of analog beamformer for generating plurality of analog beams, wherein each analog beam former is coupled to a subset of antennas comprising a fewer number antennas in the set of antennas, a mixer for combining the plurality of analog beams to provide a down converted signal, and a digital beam former for generating a plurality of digital beams, wherein a set of analog weights (FR) of the plurality of analog beamformer and a set of digital weights (FB) of the digital beamformer are selected such that effective beam formed by their product FB FR is orthogonal and spans the same space as columns of the channel matrix Hd.

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