A Precoding OFDM MIMO Radar Coexisting With a Communication System

Bao, Dan; Qin, Guodong; Cai, Jingjing; Liu, Gaogao

doi:10.1109/taes.2018.2876736

Cited by 18 publications

(15 citation statements)

References 27 publications

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“…We also assume that the channel response is constant within the period of I consecutive symbols, which is called the coherent processing interval (CPI). More detailed derivation of (6) is presented in [14]. The received signal model in (6) after FFT can also be expressed in a matrix form:…”

Section: A Ofdm Mimo Systemmentioning

confidence: 99%

“…Next, in order to generate orthogonal waveforms on different transmit antennas, the same OSTBC method is employed in the pilot design. Same with (14), the OSTBC coded pilot is given by:…”

Section: E Pilot Designmentioning

confidence: 99%

“…By substituting (38) into (14), S c (k) can be expressed as its estimation valueŜ c (k) plus a noise E c (k)…”

Section: Calculation Of the Mean And Covariancementioning

confidence: 99%

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A Superimposed Pilot-Based Integrated Radar and Communication System

2020

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In this paper, a multiple-input multiple-output (MIMO) integrated radar and communication system based on orthogonal frequency division multiplexing (OFDM) signals is proposed. We consider a bistatic scenario. Exploiting superimposed pilots and orthogonal space-time block code (OSTBC) precoding, transmitted power can be effectively used in both information symbol sending and target sensing with little energy waste and performance degradation. The expectation maximization (EM) is employed to estimate unknown symbols and the channel jointly, which can take the place of matched filtering in traditional radar. In the EM algorithm, we propose to calculate the channel expectation by using Gaussian distribution of the symbol estimation, which can make full use of the OSTBC property of sensing spatial diversity with fast maximum likelihood decoding. The autocorrelation response, and the Doppler response of moving targets in slow time are verified by numerical experiments. Simulations also show superimposed pilot is suitable in the integrated radar and communication system, even when targets with large Doppler shift exist. INDEX TERMS Integrated radar and communication, OFDM, MIMO, superimposed pilot, OSTBC.

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Section: A Ofdm Mimo Systemmentioning

confidence: 99%

“…Next, in order to generate orthogonal waveforms on different transmit antennas, the same OSTBC method is employed in the pilot design. Same with (14), the OSTBC coded pilot is given by:…”

Section: E Pilot Designmentioning

confidence: 99%

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A Superimposed Pilot-Based Integrated Radar and Communication System

2020

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“…In [28], the Doppler sensitivity of OFDM is overcome by transmitting the same symbols and correcting over all‐cell. In [33–35], OFDM radar coexisting with a communication system is proposed by adding CP. Compared to the FDA radar, the CP‐based OFDM radar has energy loss; the longer the CP, the greater the energy loss.…”

Section: Ofdm Mimo Radarmentioning

confidence: 99%

SRAP for range‐coupled radar imaging

Chen

Huang

et al. 2020

IET Radar, Sonar & Navigation

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“…These spectrum-sharing solutions also depend on the level of cooperation between radar and communications. In a selfish paradigm, the overall architecture usually promotes the performance of only one system leading to radar-centric [7][8][9] and communications-centric [10] coexistence solutions. On the other hand, the holistic solution relies on extensive mutual cooperation between the two systems in terms of transmit strategies and receive processing [3,[11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Co-Designing Statistical MIMO Radar and In-band Full-Duplex Multi-User MIMO Communications

Liu¹,

Mishra²,

Saquib³

2020

Preprint

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We present a spectral co-design of a statistical multipleinput-multiple-output (MIMO) radar and an in-band full-duplex (IBFD) multi-user MIMO (MU-MIMO) communications system both of which concurrently operate within the same frequency band. Prior works on MIMO-radar-MIMO-communications (MRMC) problem either focus on colocated MIMO radars and half-duplex/single-user MIMO communications, seek coexistence solutions, do not jointly design waveforms and receiver processing or omit practical system constraints. Here, we jointly design statistical MIMO radar waveform, uplink (UL)/downlink (DL) precoders, and receive filters. To this end, we employ a novel performance measure, namely compounded-and-weighted sum mutual information (CWSM), that is subjected to multiple practical constraints of UL/DL transmit power, UL/DL quality of service, and peak-to-average-powerratio. We solve the resulting non-convex problem by incorporating block coordinate descent (BCD) and alternating projection (AP) methods in a single algorithmic framework called BCD-AP MRMC. We achieve this by exploiting the relationship between mutual information and weighted minimum mean-squared-error (WMMSE), which allows use of the Lagrange dual problem in finding closed-form solutions for precoders and radar waveform. Numerical experiments show that our proposed WMMSE-based method quickly achieves monotonic convergence, improves target detection by 6-13% compared to conventional radar coding, and provides 8.3-30% higher rate in IBFD MU-MIMO system than other precoding strategies.

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A Precoding OFDM MIMO Radar Coexisting With a Communication System

Cited by 18 publications

References 27 publications

A Superimposed Pilot-Based Integrated Radar and Communication System

A Superimposed Pilot-Based Integrated Radar and Communication System

SRAP for range‐coupled radar imaging

Co-Designing Statistical MIMO Radar and In-band Full-Duplex Multi-User MIMO Communications

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