Brian D. Woerner

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A method for coherently detecting and decoding turbo– coded binary phase shift keying (BPSK) signals transmitted over frequency-flat fading channels is discussed. Estimates of the complex channel gain and variance of the additive noise are derived first from known pilot symbols and an estimation filter. After each iteration of turbo decoding, the channel(More)
In recent years, multiuser detection has gained significant notoriety as a potential advanced enabling technology for the next generation of CDMA systems. Currently, due to the limitations of the conventional correlation receiver, the capacity of a single cell using CDMA is limited by self-interference and is subject to the near–far problem. To overcome(More)
In this paper, we consider a scenario in which K active data users, each of which is equipped with multiple antenna elements, are served by a multi-antenna element base station (BS). We focus on the downlink channel, where space-time block coding scheme is employed and assume that channel state information (CSI) is reported to the BS by all users and on a(More)
This letter studies the numerical properties of Log-MAP-based soft-input soft-output decoding. The ranges of the differences between the path metrics, the soft output, and the complete information are derived. Since the Log-MAP algorithm is functionally dependent only upon the differences between path metrics, not their magnitudes, a modulo normalization(More)