Hybrid PAPR reduction scheme using Walsh Hadamard precoding and signal companding

The Orthogonal Frequency Division Multiplex technology is used in many communication systems. One of the important problems of these systems is the high peak-to-average power ratio of the transmitted signal. This paper presents a new hybrid technique for reduction of the peak-to-average power, which combines an variable Walsh Hadamad precoding technique with a signal companding technique. The paper presents the performance and advantages of the new proposed technique and compares it with other existing methods.