A simple and efficient adaptive rate control method is proposed, which is based on the PCRD-opt(post-compression rate-distortion optimization) rate control algorithm of JPEG2000.

16e systems,a cross-layer optimization method was proposed,which efficiently combined the sub-packet transmission scheme at data link layer and the adaptive modulation and coding(AMC) at physical layer.

An scheme of Adaptive Modulation and Coding(AMC) based on Filtered Multi-tone(FMT),is proposed in this paper.

Combined with the adaptive modulation and coding technology,this algorithm reallocates the residual power by effectively utilizing the discrete modulation orders according to the different priorities of sub-channels under the limitation of quality of service over the block fading channel.

Adaptive Modulation and Coding (AMC) is one of the key technologies for High Speed Downlink Packet Access (HSDPA),and it can change the style of modulation and coding according to channel quality, thus reasonably using and allocating system resources.

Adaptive modulation and coding is a key link adap ta tion technology to overcome the time variable in wireless channel The l ink adaptation technology includes adaptive transmit power control, adaptive mod ulation and coding, adaptive frame length control etc This paper introduces two adaptive modulation and coding and analysis their merits and disadvantage

In order to design a wireless link adaptation technology with strong channel-error correction capability and high spectral efficiency,A LDPC-based adaptive modulation coding system model and related communication scheme are studied.