Method and device for quantizing time and frequency channel and corresponding mobile communication terminal and corresponding mobile communication system

Abstract

The invention discloses a method and a device for quantizing a time and frequency channel and a corresponding mobile communication terminal and a corresponding mobile communication system. The mobile communication terminal of the invention comprises a time and frequency channel quantization device, and the method for implementing the device comprises the following steps of: A, measuring the channel state of the mobile communication terminal to obtain channel state vectors in the symbols of subcarrier waves in a physical resource block (PRB) of an orthogonal frequency-division multiplexing (OFDM) system; B, estimating related matrixes of the channel state vectors; C, performing the characteristic value decomposition of the related matrixes to obtain characteristic vectors in the physical resource block; and D, quantizing the characteristic vectors in a preset codebook. The mobile communication terminal informs a base station of code vectors obtained through the quantization; and the base station performs weighing according to the received code vectors to obtain a transmission signal to transmit the transmission signal. The method can reduce the influence of the granularity in time-frequency domains, match channels more accurately, reduce interference among multiple users and improve MU-MIMO capacity.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a time-frequency channel quantization method and a time-frequency channel quantization device, as well as a corresponding mobile communication terminal and a mobile communication system. Background technique [0002] The mobile communication system is developing towards the direction of large bandwidth, high capacity, high availability and high reliability. Multiple Input Multiple Output (MIMO, Multiple Input Multiple Output) technology, as an effective means to increase capacity, is widely used in mobile communication systems designed for the future, such as the third generation of long-term evolution technology (LTE, Long Term Evolution), global microwave access Access interoperability (WIMAX, World Interoperability for Microwave Access) technology, Beyond Third Generation in mobile communication system (B3G, Beyond Third Generation in mobile communication ...

AI Technical Summary

Problems solved by technology

[0011] In the prior art mentioned above, directly to the channel state vector h c，s averaged without extracting h c，s The characteristic channel information of the channel, due to the time-varying characteristics of the channel and the frequency selectivity of the channel, the channel state vectors on different subcarriers and different symbols are different, and the channel state vector obtained by the above-mentioned prior art h a It cannot represent the characteristic channel on the entire PRB, so it cannot effectively eliminate the time-frequency granularity pair h a The impact of the channel cannot be accurately matched, the interference between multiple users is serious, and the capacity of MU-MIMO is low, the performance gain is poor, and even h a When it approaches 0, the channel quantization fails

Images