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2007
IEEE

Iterative EM Based LDPC CDMA Receiver under Time Varying Interference

9 years 1 months ago
Iterative EM Based LDPC CDMA Receiver under Time Varying Interference
1 — The authors of this paper proposed an iterative expectation-maximization (EM) channel estimation based on a low-density parity-check (LDPC) code-division multiple access receiver in their previous work. The receiver algorithm could efficiently estimate both channel coefficients and noise power spectral density (PSD). However, their previous work considered only a single user channel environment, so they tested only for a constant noise PSD. In the current paper, we extend the single user to a more realistic multiuser environment for the testing of a time-varying interference plus noise PSD estimation. Also our proposed adaptive PSD estimation scheme will be compared with a conventional system in which a constant PSD is assumed. It will show that the proposed iterative EM scheme can provide accurate interference plus noise PSD estimates to the LDPC decoder.
Don J. Torrieri, Avinash Mathur, Amitav Mukherjee,
Added 04 Jun 2010
Updated 04 Jun 2010
Type Conference
Year 2007
Where VTC
Authors Don J. Torrieri, Avinash Mathur, Amitav Mukherjee, Hyuck M. Kwon
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