This paper considers receiver design for space time block coded MIMO OFDM transmission over frequency and time selective channels. The receiver employs the expectation-maximization algorithm for joint channel and data recovery. It makes collective use of the data and channel constraints of the communication problem. The data constraints include pilots, the… (More)
We study diversity and interference mitigation with an emphasis on the interaction between the transmitter-receiver (Tx-Rx) pairs in a two-user, two-cell system in which the performance at each Rx depends on the actions of the both desired and the interfering Txs. We will propose two techniques. The first scheme is a greedy or competitive algorithm in which… (More)
results demonstrate an increase in the normalized goodput of up to 80% in downlink transmission and 100% in uplink transmission over existing schemes.
— In this paper we study the downlink spectral efficiency of a wireless network using Orthogonal Frequency Division Multiple Access (OFDMA), Multiple Input Multiple Output (MIMO) antenna systems and Opportunistic Scheduling (OS) techniques. The main purpose of the study is to understand how these techniques interact and influence the spectral efficiency of… (More)
In this paper, we propose a transmitter based scheme to simultaneously mitigate fading to a desired receiver and co-channel interference to an interferee. We focus on downlink transmission at the base station with multiple antennas at transmit and a single receiver at the intended and interferee receivers. We show how appropriate pre-coding and space-time… (More)