Patent ID: 7570697
Filing Date: 2009-08-04
Classification: H03M,H04B,H04L

Abstract:
1. An interleaver system for use with MIMO transmission of encoded data, comprising: a parser for parsing encoded data comprising N CBPS bits that are to be transmitted, wherein parsing comprises allocating portions of the encoded data over a plurality of N TX spatial streams; and a plurality of N TX stream interleavers, wherein each of the stream interleavers interleave such that the stream interleaver for the n-th spatial stream outputs bits in an order indicated by an interleaver index for TX n within its block of N CBPS /N TX bits where the interleaver index, j n , is equal to (j+N CBPS /N TX −2s*D n ) mod (N CBPS /N TX ), wherein j=s floor(i/s)+(i+N CBPS /N TX −floor(I DEPTH *i/( N CBPS /N TX ))) mod s where s=max(N CBPS /2, 1), i=((N CBPS /N TX )/I DEPTH )(k mod I DEPTH )+floor(k/I DEPTH ) for k=−0, . . . , (N CBPS /N TX )−1, k n =N TX k+n, N CBPS is the number of coded bits for one subcarrier of one spatial stream and I DEPTH is an interleaving depth.