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IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. 54, NO. 5, MAY 2006 911 Optimum DCT-Based Multicarrier Transceivers
 

Summary: IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. 54, NO. 5, MAY 2006 911
Optimum DCT-Based Multicarrier Transceivers
for Frequency-Selective Channels
Naofal Al-Dhahir, Senior Member, IEEE, Hlaing Minn, Member, IEEE, and Shilpa Satish
Abstract--We derive conditions on the impulse response and
input signal of a frequency-selective finite-impulse response
channel to be diagonalized by the discrete cosine transform (DCT)
into parallel, decoupled, and memoryless subchannels. We show
how these conditions can be satisfied in a practical multicarrier
transceiver through a novel design of the guard sequence and the
front-end prefilter. This DCT-based design results in complete
elimination of interblock and intercarrier interference without
channel knowledge at the transmitter and at the same guard
sequence overhead, compared with DFT-based multicarrier
transceivers. Extensions to multiinput multioutput frequency-se-
lective channels are also described. Finally, we present numerical
examples from wireline and wireless communications scenarios
to illustrate the viability and practicality of the DCT as a modu-
lation/demodulation basis for baseband and passband signaling
over frequency-selective channels.

  

Source: Al-Dhahir, Naofal - Department of Electrical Engineering, University of Texas at Dallas
Minn, Hlaing - Department of Electrical Engineering, University of Texas at Dallas

 

Collections: Engineering