Peak Power Optimization Method and Transmitting System in OFDM System

Abstract

The invention discloses a peak power optimization method in an orthogonal frequency division multiplexing system and a transmitting system thereof. The transmitting system of the peak power optimization method in the orthogonal frequency division multiplexing system comprises a random binary sequence generator module, a mapping module and an interleaving sub-block division module, wherein the random binary sequence generator module, the mapping module and the interleaving sub-block division module are connected in sequence, the interleaving sub-block division module is simultaneously connected with a multiplying unit module and a plurality of IFFT modules, the multiplying unit module is connected with a phase position weighing sequence generator module and one corresponding IFFT module, all the IFFT modules are connected with an adder module, and the adder module is connected with an optimal candidate signal selection module. In addition, all the IFFT modules corresponding to sub-block sequences except a first sub-block sequence are connected with a conjugate shift processing module, and the conjugate shift processing module is connected with an adder.

Description

technical field [0001] The invention relates to a peak power optimization method based on partial phase weighted selective mapping in an orthogonal frequency division multiplexing system and a transmitting system thereof, belonging to the technical field of digital communication. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) is a very effective high-speed data transmission technology, and can better resist frequency selective fading, and has been applied to many fields of wireless communication. Although OFDM technology has many advantages, the peak power problem has always been one of the main drawbacks of this technology. Excessive peak power will cause OFDM signal distortion, which will lead to system performance deterioration, which requires the high power amplifier (HighPowerAmplifier, HPA) at the sending end to have a large enough linear range, but this requirement is difficult to achieve in terms of hardware Very large and very expen...

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Problems solved by technology

[0015] The purpose of the present invention is to address the shortcomings of the prior art, that is, the problem of very large computational complexity, to provide an OFDM with low computational complexity, good peak-to-average power ratio performance, and can meet the requirements of practical applications. Optimizing Method of Peak Power in System and Its Transmitting System

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