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This paper proposes a new receiver design for a type-I hybrid automatic repeat request (ARQ) scheme in wireless packet data services. To achieve reliable transmission under a multipath fading channel environment, temporal diversity from retransmissions is utilized to facilitate channel equalization and error correction via low density parity check (LDPC) codes. A linear equalization receiver structure and an iterative interference cancellation receiver structure are investigated separately. Moreover, three different channel estimation schemes are discussed and their impact on throughput performance are demonstrated.