Encoding apparatus and method in CDMA communication system

摘要

There is provided an encoding apparatus and method in a CDMA communication system. To encode input information of a k-bit sequence and generate a codeword with length N>(2^k-1), an encoder encodes the input information using an (r, k) simplex code and generates a sequence of code symbols of length r (r=2^k-1), a repeater repeats the sequence of code symbols t times $\left(t=\lfloor \frac{N}{r}\rfloor +1\right),$ and a puncturer performs puncturing A times (A=rt-N) on the t repeated code symbol sequences so that the resulting codes have length N. The punctured symbols are distributed uniformly across the repeated code symbol sequences or confined to the t^th repeated code symbol sequence.