Capacity analysis for joint radar-communication capable coherent MIMO radars

Abstract

Recently, huge attention is attracted to the concept of integrating communication and radar missions within the same platform. Joint radar-communications (JRC) system gives an important opportunity to reduce spectrum usage and product cost while doing concurrent operation, as target sensing via radar processing and establishing communication links. A JRC-capable coherent MIMO radar system have been proposed recently in the literature. Several methods are introduced to reach dual goal as a notable null level towards the direction of interest of the radar and MIMO radar waveform orthogonality. Due to the limitations originated form the JRC operation, communication channel may encounter unwanted amplitude variations. This unwanted modulation normally affects the communication performance by its nature, due to the fades on radiated signal amplitude towards the direction of communication. However, the effect of this unintentional modulation on communication channel is yet to be investigated. In this paper, the communication channel for JRC capable phase-coded coherent MIMO radars is analyzed and investigated under additive white Gaussian noise and Rayleigh fading conditions. Communication capacity is evaluated for each channel condition. The results reveal that, using the single-side limited null direction fixed waveform generation method displays the best capacity performance under all channel conditions.Recently, a JRC-capable monostatic coherent MIMO radar system have been proposed in [2]. Coherent MIMO radars offer fully coherent signal processing and coherent transmit beamforming which present radiation patterns to reduce the probability of intercept. In [2], MIMO radar waveform coding technique in [3] is modified for enabling communication without disturbing coherent MIMO radar structure. JRC ability is accomplished for coherent MIMO radar without disturbing the orthogonality and transmit beamforming requirements. Three different novel communication methods are proposed in [2]. First method uses each sub-pulse in the radar pulse for communication. This method is directional and it may provide thousands of bits per radar pulse. Second method exploits coding mechanism

Joint Radar-Communication Relying on NLFM-MSK Design

“…In this situation, limited wireless spectrum resources have become more and more valuable, making the reuse of spectrum resources extremely urgent. Based on this application background, the joint radar-communication (JRC) technology is gaining more and more attention [4][5][6]. As shown in Figure 1, the JRC system has greatly alleviated the problems of spectrum shortage, multiplatform interference, antenna reuse, and excessive energy consumption.…”

Joint Radar-Communication Relying on Spread Spectrum: A Hybrid Chaotic Sequence Design

“…Although in radio frequency (RF) front-end architectures, both the radar and communication become similar, operating radar and communication simultaneously cause a series of problems such as the number of antennas, the energy consumption, and electromagnetic signal interference. So the concept of joint radar-communication (JRC) is proposed in the recent few decades, which enables radar and wireless communication users working in the same frequency band, sharing the same antenna resources, implementing radar sensing, and communication transmission synchronously [3][4][5][6][7][8]. A typical JRC is illustrated in Figure 1, it is shown that the JRC signal is sent from the radar transmitter, and the communication and radar are operated simultaneously.…”