Method, equipment and system for joint distribution of bits and power to subcarriers

Abstract

The invention provides a method, equipment and a system for joint distribution of bits and power to subcarriers. According to hardware parameters of a non-linear power amplifier and channel noise, the relation among the ratio of signal to interference of each subcarrier, the power of the subcarriers and the total power under a non-linear distortion condition is determined, so that non-linear distortion noise generated by the non-linear power amplifier can be taken into account, and the corresponding bit and the corresponding power are jointly distributed to each subcarrier by means of a preset total power minimum iterative algorithm according to the determined relation among the ratio of signal to interference of each subcarrier, the preset input power, the total bits and the bit error rate under the non-linear distortion condition. Compared with the prior art, the method, equipment and the system for the joint distribution of the bits and the power to the subcarriers enable the non-linear distortion of the non-linear power amplifier to be taken into account, ensure the minimization of the total power, and can better meet requirements for a system bit error rate (BET) at the same time.

Description

technical field [0001] The present invention relates to communication technology, in particular to a subcarrier bit and power joint allocation method, device and system. Background technique [0002] Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Dkvkskon Multkplexkng, OFDM), as a multi-carrier modulation technology, has the advantages of high spectrum utilization and anti-multipath delay, and has become the core technology of the next generation mobile communication system. OFDM converts the high-speed data stream into serial and parallel, divides the high-speed data stream into multiple low-speed data streams, and then modulates it onto each subcarrier (QPSK or QAM). The allocation algorithm of wireless resources in the OFDM system, such as subcarrier bits and power, is the key to the use of the OFDM system. Resource allocation in OFDM system is an important means to ensure user service quality, improve system capacity and spectrum utilization. The purp...

AI Technical Summary

Problems solved by technology

However, in an actual communication system, the nonlinear characteristics of the nonlinear power amplifier at the transmitting end make the OFDM signal with peak-to-average ratio prone to nonlinear distortion noise, which deteriorates system performance

The existing technology is only a method of wireless resource allocation to reduce the complexity of the algorithm, and cannot guarantee to meet the requirements of the system Bit Error Ratio (BER) while minimizing the total transmission power.

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