Figure 2
From: IDMA-based cooperative partial packet recovery: principles and applications
The structure of receiver. (a) CDMA receiver with IDMA partial-packet-recovery module. (b) The structure of partial packet recovery receiver. R list denotes the list of bits required to be retransmitted. N retx denotes the maximum number of retransmission. n r denotes the counter of retransmission. For each retransmission, n r is incremented by 1. π and π-1 the interleaver and deinterleaver, respectively. DEC denotes the decoder of repetition code.