Pulse Propagation in Noisy Channels and Soft Decoding:

We consider a precoding scheme without modulo operation at the receiver for the Gaussian channel with Gaussian interference which is known causally at the transmitter. Modulo operation which is conventionally applied to the received signal for the sake of convenience in analysis causes information loss. In this paper, we investigate the gain in capacity by removing modulo operation at the receiver. We also propose an end-to-end communication scheme based on the proposed precoding scheme by concatenating the precoder with LDPC codes. Bit error rate curves also confirm the superiority of the precoding method without modulo operation at the receiver.