In this work, the uplink of a CDMA system with two user classes is considered. One of the classes consists of delay intolerant users requiring support for a constant information bit rate R, while the other consists of delay tolerant users needing support for an information bit rate of at least Rm. It is assumed that when not transmitting information, both classes maintain synchronization contac...

| An e cient multicast hybrid ARQ scheme is proposed by incorporating the generalized minimum distance (GMD) decoding of maximum distance separable (MDS) codes with Metzner's scheme [8]. Erroneous frames are stored in the receiver bu er and recovered after receiving one or more redundant frames. The throughput and the average transmission delay of the proposed scheme are analyzed on memoryless ...

The paper focuses on improving performance of land mobile satellite channels (LMSC) at high band (K or EHF band), where shadowing is the primary impediment to reliable data transmission. Compared with multipath fading, shadowing exists on a longer time scale. Hence interleaving to combat shadowing introduces unacceptably large decoding delay. Here we propose an adaptive two-copy delayed SR-ARQ ...