Design of irregular repeat accumulate codes for OFDM systems with partial channel state information Academic Article

abstract

• Irregular repeat accumulate (IRA) codes perform very close to capacity on some memory-less channels with coherent detection. Further, they can be encoded and decoded in linear time. This paper considers the design of IRA codes for intersymbol interference (ISI) channels when only partial channel state information (CSI) is available at the receiver and orthogonal frequency-division multiplexing (OFDM) is used as the modulation format. The authors use a simple receiver structure that performs iterative channel estimation and decoding and use nonsystematic IRA codes that are optimized for this receiver. This combination is shown to perform within a few tenths of a decibel from the capacity of a receiver with perfect CSI and is also shown to be robust to change in the number of channel taps and Doppler. 2005 IEEE.

authors

• Narayanan, Krishna

published proceedings

• IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS

author list (cited authors)

• Sankar, H., & Narayanan, K. R.

citation count

• 7

complete list of authors

• Sankar, H||Narayanan, KR

publication date

• September 2005

publisher

• Institute of Electrical and Electronics Engineers (IEEE)  Publisher

published in

• IEEE Transactions on Wireless Communications  Journal

keywords

• Channel Capacity
• Channel Coding
• Extrinsic Information Transfer (exit) Charts
• Fast Fourier Transform (fft)
• Irregular Repeat Accumulate (ira) Codes
• Iterative Detection And Decoding
• Orthogonal Frequency-division Multiplexing (ofdm)
• Partial Channel State Information
• Rayleigh Fading Channels

Digital Object Identifier (DOI)

• 10.1109/TWC.2005.855791

start page

• 2491

end page

• 2497

volume

• 4

issue

• 5

URL

• http%3A%2F%2Fdx.doi.org%2F10.1109%2Ftwc.2005.855791