Performance, Complexity, and Receiver Design for Code-Aided Frame Synchronization in Multipath Channels

Daniel J. Jakubisin

doi:10.1109/TCOMM.2015.2460246

2015-09-01

PRE

Daniel J. Jakubisin *

R. Michael Buehrer

DOI：10.1109/TCOMM.2015.2460246

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摘要

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Next generation wireless communications systems are pushing the limits of both energy efficiency and spectral efficiency. This presents a challenge at the receiver when it comes to accomplishing tasks such as synchronization, channel estimation, and equalization and has motivated the development of code-aided iterative receiver algorithms in the technical literature. In this paper, we focus on the task of frame synchronization. While previous work has predominately assumed an additive white Gaussian noise channel, we develop code-aided frame synchronization algorithms for multipath channels. An iterative receiver is presented which integrates frame synchronization with iterative channel estimation, equalization, demodulation, and decoding. The receiver design includes a novel frame pre-processing stage to reduce the complexity of the proposed receiver. The complexity and performance of the proposed receiver is compared with that of a receiver based on conventional synchronization. The results demonstrate that the proposed receiver is capable of achieving a gain of up to 3 dB while increasing complexity by only 20%.

Keyword:

Frame synchronization

code-aided

iterative receivers

multipath channels

sum product algorithm

expectationmaximization algorithm