# 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:

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

### Related publications

**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

### Repository data

File: | cma_papr.zip |
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Size: | 9 kB |

Modified: | 2 January 2018 |

Type: | software |

Authors: | Seyran Khademi, Alle-Jan van der Veen |

Date: | April 2012 |

Contact: | Alle-Jan van der Veen |