Compress-Forward Without Wyner-Ziv Binning for the One-Way and Two-Way Relay Channels

The authors consider the role of Wyner-Ziv binning in compress-forward for relay channels. In the one-way relay channel, they analyze a compress-forward scheme without Wyner-Ziv binning but with joint decoding of both the message and compression index. It achieves the same rate as the original compress-forward scheme with binning and successive decoding. Therefore, binning helps reduce decoding complexity by allowing successive decoding, but has no impact on achievable rate for the one-way relay channel. On the other hand, no binning simplifies relay operation.