This paper deals with multi-packet detection for SC modulations (Single-Carrier) with FDE (Frequency Domain Equalization) to be used in the uplink of wireless systems. We consider iterative frequency-domain receivers that jointly perform the equalization, multi packet separation and channel decoding operations. Our receivers allow high throughput provided that the number of mobile terminals that is trying to access a given slot is equal to or below the multi-packet detection capacity Qmax. We design a MAC protocol able to handle a total number of mobile terminals above Qmax by controlling the number of contending mobile terminals. The paper evaluates the throughput of a saturated system with two retransmission policies: constant probability and exponential backoff. It proposes an optimal configuration for the initial packet transmission probability p associated to each mobile terminal for both policies. Our analytical results are validated using physical and MAC layer simulations, and show that a constant p outperforms the exponential backoff approach for the optimal p value.
|Conference||International Conference on Parallel and Distributed Computing and Networks|
|Period||1/01/09 → …|