Iterative decision feedback equalization algorithm by loop detection in E-UTRAN uplink
一种判决反馈均衡、循环检测的技术,应用在发射机/接收机中的整形网络、基带系统零部件、多频码系统等方向,能够解决增加错误率、符号判错等问题,达到提高检测性能的效果
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[0016] The present invention will be further described below in conjunction with the accompanying drawings.
[0017] figure 1 It is the system block diagram of DFT-S OFDM sending end and receiving end.
[0018] For a single user, the data is transformed into the time domain by DFT and then allocated to specified subcarriers (the number of occupied subcarriers can be set, and the allocation methods can be centralized or distributed), with a total of 512 subcarriers. Then IFFT transforms the frequency domain signal into a time domain signal to form LB (long block), and add a cyclic prefix. Multiple LBs constitute a transmission subframe.
[0019] figure 2 It is a comparison diagram of CP structure and two UW structure frames in LB.
[0020] Sub-picture (a) is the frame structure required in the protocol, and the last 31 bits in the data LB are copied to the front of the block to form a circular structure. The sub-picture (b) is a traditional UW structure, and the space bet...
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