Method, apparatus and system for channel estimation and pilot insertion in MIMO system

Abstract

The present invention discloses a method, an apparatus and a system for channel estimation and pilot insertion in an MIMO system, wherein the method comprises the steps of: determining whether the number of the symbols in an MIMO area of a receiving end is integral multiple of 4; respectively extracting the pilot subcarriers from the symbol portion which is integral multiple of 4 and the remaining symbol portion which is non-integral multiple of 4, to perform the channel estimation; in a transmitting terminal, correspondingly determining whether the number of the symbols in an MIMO area of the transmitting terminal is integral multiple of 4; and respectively inserting pilot subcarriers into the symbol portion which is integral multiple of 4 and the remaining symbol portion which is non-integral multiple of 4. The method for channel estimation and pilot insertion of the invention can flexibly realize the pilot subcarrier insertion and channel estimation by using the pilot subcarriers when the downlink MIMO system area is configured with any quantity of symbols, thereby overcoming the restriction on the channel estimation from the number of symbols, enhancing the flexibility of the frame configuration in a downlink MIMO system, and increasing the utilization rate of the subcarriers.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method, device and system for channel estimation and pilot insertion in a wireless multiple input multiple output (MIMO, Multiple Input Multiple Output) communication system. Background technique [0002] In a wireless communication system, because the propagation path between the transmitter and the receiver is very complicated, the transmission quality of the signal on the wireless channel will be affected. In addition, the wireless channel is not as fixed and predictable as the wired channel, but has a large The randomness of the channel often causes the amplitude, phase and frequency distortion of the received signal, which affects the performance of the wireless communication system. Therefore, channel estimation is particularly important in the wireless communication system. Channel estimation can be defined as the process of conducting feasibility studies to describ...

AI Technical Summary

Problems solved by technology

In this MIMO system, since the determination of the channel estimation value requires 4 symbols, the overall frame ratio of the system is limited, that is to say, the number of regional symbols in the MIMO system is only valid when it is a multiple of 4 In the data area, when the number of symbols in the MIMO area is not an integer multiple of 4, the subcarriers will not be fully utilized. If the channel estimation is performed by simple averaging in the extra symbols, the bit error rate will increase.

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