The HGBBDSA is accomplished the
subcarrier allocation improving task that distributed inside the HeNBs and the adjacent HeNBs, by allotting the subchannel to HUE in LTE-A HetNet.
"
Subcarrier group assignment for MC-CDMA wireless networks", EURASIP Journal on Wireless Communications and Networking.
According to the central limit theorem and if the number of
subcarriers N is large enough, the real and imaginary parts of the time domain signal samples follow the Gaussian distribution function with zero mean and variance 1/2.
The coefficients of the minimum mean square error(MMSE-) frequency domain equalization (FDE) for the kth
subcarrier, W[fc], are given by
The short training symbols are followed by a long training symbol which contains 52 QPSK modulated
subcarriers like a normal data symbol.
Current AC Site Management customers will continue to be served by
Subcarrier's office in Houston, Texas.
However, the large usage of additional
subcarriers for the dummy sequences can directly cause the reduction of transmission efficiency.
In the demodulation process, based on the orthogonality between the
subcarriers, the result for the lth
subcarrier for the rth block (assuming 0 [less than or equal to] l [less than or equal to]N - 1) is as follows:
Moreover, SU can access the ith
subcarrier, where [g.sup.pp.sub.i,j], [g.sup.ss.sub.i,j], [g.sup.sp.sub.i,j], and [g.sup.ps.sub.i,j], denote the channel power gain of the primary link, the secondary link, the link between SU-Tx and PU-Rx and the link between PU-Tx and SU-Rx in the jth small cell.