Iterative decision feedback equalization algorithm by loop detection in E-UTRAN uplink
A technology of decision feedback equalization and cyclic detection, which is applied to the shaping network in the transmitter/receiver, baseband system components, multi-frequency code system, etc., can solve the problems of increasing error rate and symbol error judgment, and achieve improved detection performance effect
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[0016] The present invention will be further described below in conjunction with the drawings.
[0017] figure 1 It is the system block diagram of the DFT-S OFDM transmitter and receiver.
[0018] For a single user, data is transformed into time domain by DFT and then allocated to designated subcarriers (the number of occupied subcarriers can be set, and the allocation method can be centralized and distributed), with a total of 512 subcarriers. Then the frequency domain signal IFFT is transformed into a time domain signal to form an LB (long block), and a cyclic prefix is added. Multiple LBs constitute one transmission subframe.
[0019] figure 2 It is a comparison diagram of the CP structure and two UW structure frames in LB.
[0020] Sub-picture (a) is the frame structure required in the protocol. The last 31 bits in the data LB are copied to the front of the block to form a cyclic structure. The sub-picture (b) is a traditional UW structure, and the two data blocks are filled ...
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