Constant Modulus Algorithm for Peak-to-Average Power Ratio (PAPR) Reduction in MIMO OFDM/A

In the corresponding paper, a new peak-to-average power ratio (PAPR) reduction approach for MIMO-OFDM/A is developed based on the well- known constant modulus algorithm (CMA). This combines two ideas: 1) time domain signals from “resource blocks” (consisting of several subcarriers) may be linearly combined using precoding weights, transparent to the receiver; 2) the precoding weights can be designed to minimize the modulus variations of the resulting signal, leading generally to a reduction in PAPR. This technique is compatible with various beamforming modes in single antenna and MIMO systems. Simulation results show a noticeable improvement relative to the Partial Transmit Sequences (PTS) technique with significantly less complexity.

The attached package provides a Matlab main script and functions for simulation of PAPR reduction in MIMO OFDM/A system using the block CMA algorithm. This includes:

1. one main script called "MIMO_PAPR_MainScript",
2. m.function files which are used in the main script.

Note that functions "kr.m" and "get_orthonormal.m" are not produced by the authors and are provided here as complementary files that are required for the execution of the code.

Related publications

1. Constant Modulus Algorithm for Peak-to-Average Power Ratio (PAPR) Reduction in MIMO OFDM/A
   S. Khademi; A.J. van der Veen;
   IEEE Signal Processing Letters,
   Volume 20, Issue 5, pp. 531-534, May 2013.
   document