By Topic

16-DAPSK sequence detection in fading channels with carrier frequency offset estimation

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

2 Author(s)
Nunes, F.D. ; Instituto de Telecomunicacoes, Lisbon, Portugal ; Leitao, J.M.N.

The use of multi-level (QAM-type) modulations in mobile communications affected by fading and Doppler shift imposes a tight control on the carrier frequency offset if quasi-coherent detection is a goal. This aspect is taken into account by the receiver herein proposed. A 16-DAPSK (differential amplitude phase shift-keying) scheme is considered, with one bit being absolutely encoded in amplitude and the other two bits differentially encoded in phase by a 8-state Ungerboeck trellis-code. To estimate the frequency offset the receiver includes a bank of stochastic nonlinear filters, an innovations processor and a modified Kay algorithm. Sequence detection is performed by a gain estimator and a Viterbi algorithm fed by the frequency-corrected input samples. The receiver can cope with considerable phase drifts within the symbol interval, which allows significant Doppler shifts or the operation of free-running oscillators with moderate frequency stabilities and large symbol durations.

Published in:

Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on  (Volume:5 )

Date of Conference:

15-18 Sept. 2002