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Now a days the number of users of mobile phone are increasing exponentially, so it will cause jamming in the network and require large bandwidth So among promising technology candidates to overcome this problem, cloud radio access network (C-RAN) used. C-RAN, having one baseband unit (BBU) communicates with users through distributed Remote Radio Heads (RRHs) .RRH are connected to the BBU via high capability, low latency fronthaul links and performs soft relaying. The architecture of C-RAN imposes a shortage of fronthaul bandwidth because raw I/Q samples are exchanged between the RRHs and the BBU. In BBU different algorithms are used to improve the capacity, joint decompression and decoding (JDD) and wyner ziv coding.