By Topic

A channel coded CP-OFDM interpretation of TZ-OFDM systems

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Manton, J.H. ; Dept. of Electr. & Electron. Eng., Univ. of Melbourne, Vic., Australia

Trailing zero (TZ) OFDM systems replace the cyclic prefix (CP) in OFDM systems by a sequence of zeros. However, this paper shows that a cyclic prefix is still present in TZ-OFDM systems. Indeed, it is shown that a TZ-OFDM system implicitly works by first adding redundancy to the symbols to be transmitted (channel coding) and then adding a cyclic prefix. This paper also proves that the channel coding introduced by the TZ-OFDM system is spectrally balanced, meaning that it maps white noise to (essentially) white noise. This is a desirable property because it is known that any coding scheme which achieves the channel capacity over an unknown multipath channel must be white-like. By introducing the Cramer-Rao bound as a figure of merit, it is shown that there exist channels over which a TZ-OFDM system performs worse than an uncoded OFDM system. The Cramer-Rao bound is also used to explain why using a cyclic prefix is desirable; it allows channels with otherwise unstable inverses to be inverted accurately

Published in:

Statistical Signal Processing, 2001. Proceedings of the 11th IEEE Signal Processing Workshop on

Date of Conference:

2001