Bit dispensing equipment, transmitter, bit distribution method and power distribution method

Abstract

The embodiment of the invention provides bit dispensing equipment, a transmitter, a bit distribution method and a power distribution method. The device comprises a selecting unit and a distributing unit, wherein the selecting unit is used for selecting a modulation symbol set from a plurality of modulation symbols of prearrangement quantity according to the bit metric value of channel quality indicating each bit position in each modulation symbol, so as to ensure the bit number summation of modulation symbols contained in the modulation symbol set to be equal to the pre-allocated code word bit number; and the distributing unit is used for ensuring the pre-allocated code word bits to be distributed on the modulation symbols in the modulation symbol set selected by the selecting unit. The device can select one subset with good performance to distribute bits from the plurality of modulation symbols of prearrangement quantity according to the bit metric value, an ABL (atlas basic language) algorithm is simplified, and optimal soft demodulation information output by a demodulation algorithm is ensured.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a bit allocation device, a transmitter, a bit allocation method and a power allocation method. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM: Orthogonal Frequency Division Multiplexing) system is a multi-carrier transmission technology in the mobile communication environment. A series of orthogonal flat fading channels. [0003] In an Orthogonal Frequency Division Multiplexing (OFDM) system, the modulation mode of the transmitter can be adaptively adjusted based on the channel state information (CSI: Channel State Information) of each subcarrier fed back by the receiver, which is essentially based on the channel condition Differently, the number of bits is allocated on each subcarrier, which is an adaptive bit allocation algorithm (ABL: Adaptive Bit Loading Algorithm). At present, the purpose of most adaptive bit allocation algorithms ABL i...

AI Technical Summary

Problems solved by technology

[0004] However, in the process of realizing the present invention, the inventor found that the prior art has the following problems: for a coded system, the above-mentioned ABL cannot make full use of the feedback information, and cannot be optimized to the bit metric; in addition, in a coded system, the soft input soft The decoding algorithm of the output (i.e. outputting real numbers) is one of the main factors that determine the performance of the system. Therefore, the demodulation algorithm is required to provide accurate soft demodulation information as much as possible to ensure the correct decoding of the decoder.

Images