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학술대회 Adaptive Bit Truncation and Restoration for Baseband Signal Compression
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오정훈, 조권도, 박봉혁
International Conference on Advanced Technologies for Communications (ATC) 2014, pp.73-77
14MI9100, (통합)초연결 스마트 모바일 서비스를 위한 5G 이동통신 핵심기술개발, 정현규
The distributed base station architecture is one of the good solutions to reduce the system complexity and manage the cellular mobile communication system more efficiently. Typical distributed base stations consist of base band units (BBUs) and remote radio heads (RRHs). RRHs are deployed apart from BBU and connected to it generally through a fiber optic cable. Compression of baseband signal is an efficient way to decrease the data rates on the fiber link between BBU and RRHs. This paper presents a compression and decompression scheme. It truncates least significant bits according to the largest absolute value in a block, thereby achieves lossy compression at each of I and Q data, respectively. It restores the signal by using proposed stuffing bits to suppress DC component in the signal and relieve signal to noise ratio degradation by compression and decompression. The simulation results suggest that the proposed scheme provides promising performance of error vector magnitude with low latency. It enables cost effective implementation since it does not require any multiply accumulate operation. Simple bit operations are needed in proposed scheme.
KSP 제안 키워드
Absolute value, Cellular mobile communication, DC component, Effective Implementation, Fiber link, Least Significant Bit(LSB), Lossy Compression, Low latency, Multiply and Accumulate(MAC), Remote Radio Head(RRH), Signal compression