Permutation Channel Modulation: New Index Modulation Mechanism for MIMO

Abstract

In this paper, we propose a novel index modulation mechanism called permutation channel modulation (PCM) by exploiting spatial resource of multiple input multiple output (MIMO). A set of permutation matrices is treated as indices to convey information bits by modulating a block of bits to a permutation matrix. Assuming that channel state information at transmitter (CSIT) is known, modulated permutation matrix is multiplied to the singular values of MIMO channel matrix obtained from decomposing the channel matrix using singular values decomposition (SVD). Besides to a permutation matrix, information bits are also modulated to constellation symbols. Therefore, the transmitted signals contain two sources of information: a permutation matrix and constellation symbols. At the receiver, transmitted symbols and a permutation matrix are detected using our proposed detection scheme. We derive the capacity expression and define the optimal capacity by finding the optimal power allocation at each transmission. As performance measure, capacity of PCM is compared with existing techniques. Using 4 × 4, we find that the capacity of PCM is doubled and remains superior with higher antenna settings. Our work creates a new paradigm of index modulation for multiple antenna transmissions by exploiting its spatial resource and significantly improves the capacity and outage probability performances.

Permutation Matrix Modulation

“…• We continue the early work of [8] by providing the system achievable rate performance under the GMM distribution. We also show that our system in this paper can work in the absence of CSIT, unlike in [8].…”

“…PCM system, which utilizes all-antenna activation, was originally proposed in [8]. The basic system model and capacity analysis of PCM were discussed.…”

“…The main idea of this paper is to propose a new structure of PCM different from [8]. We call this new structure Permutation Matrix Modulation (PMM) instead of PCM.…”

“…A new system called Permutation Channel Modulation (PCM) has been proposed in [8] which offers a new paradigm to exploit index modulation in MIMO. PCM permutes the position of singular values obtained from decomposing the MIMO channel by assuming that channel state information is available at both transmitter (CSIT) and receiver (CSIR).…”

A Reliable Singular Value Decomposition and Geometric Mean Decomposition Based Precoding Scheme for MU-MIMO-VLC System

“…MIMO communication utilizes space resources and changes the number of antennas at the receiving end and the transmitting end [8]. MIMO technology is not only widely used in the RF field, but also has been applied by researchers to many other scenarios [9]. And researchers also develop many technologies that can be applied on the basis of this technology, such as diversity coding, precoding [10] etc.…”