Dynamic signal of grouping and - coding for more carrier - - quadrature amplitude modulation is in ofdm

摘要

It is a method of a dynamic signal grouping (dtg) is proposed, which from a transmitter in a wireless orthogonally - frequency - division - multiplexing (ofdm) - system is used. We first a sequence of coded and interleaved bits in a number of bit streams de - multiplexes. Each bit stream is to a sequence of quadrature - amplitude modulation (qam) - symbols, which in not - overlapping sequences of qam - symbols are grouped. Next, a unitary transformation to the qam - symbols are used in order to produce groups of complex signals. Finally, the complex signals on the basis of a signal - mapping - information dynamically to the imaged under carrier groups, in order to improve a connection power. The signal - mapping - information is of an item of information are obtained which, with each ofdm - subcarriers is linked, such as, for example, a channel state information (csi). The ofdm - subcarriers in be under carrier groups according to the signal - mapping - information are grouped together in such a way that the channel quality under carrier group is compensated for each. In addition, the signal - mapping - information encoded in an effective manner, and results in a corresponding receiver or received by it.