Use this resource - and many more! - in your textbook!
AcademicPub holds over eight million pieces of educational content for you to mix-and-match your way.
Adaptive multidimensional coded modulation over flat fading channels
By: Holm, H.; Hole, K.J.; Oien, G.E.;
2000 / IEEE
This item was taken from the IEEE Periodical ' Adaptive multidimensional coded modulation over flat fading channels ' We introduce a general adaptive coding scheme for Nakagami multipath fading channels. An instance of the coding scheme utilizes a set of 2L-dimensional (2L-D) trellis codes originally designed for additive white Gaussian noise (AWGN) channels. Any set of 2L-D trellis codes for AWGN channels can be used, Sets for which all codes can be generated by the same encoder and decoded by the same decoder are of particular interest. A feedback channel between the transmitter and receiver makes it possible to transmit at high spectral efficiencies under favorable channel conditions and respond to channel degradation through a smooth reduction of the spectral efficiency. We develop a general technique to determine the average spectral efficiency of the coding scheme for any set of 2L-D trellis codes. As an illustrative example, we calculate the average spectral efficiency of an adaptive codec utilizing eight 4-D trellis codes. The example codec is based on the International Telecommunications Union's ITU-T V.34 modem standard.
Itu-t V.34 Modem Standard
Adaptive Multidimensional Coded Modulation
Flat Fading Channels
Adaptive Coding Scheme
Nakagami Multipath Fading Channels
Additive White Gaussian Noise Channels
2l-d Trellis Codes
Additive White Noise
Trellis Coded Modulation
Communication, Networking And Broadcast Technologies