Water suppression was achieved with WATERGATE [63].
With commitment it can be achieved.
For example, in [17, 18], uncoded OFDM is studied, and it was shown that if relay selection is done on a per-subcarrier basis, full spatial diversity can be achieved.
As a performance measure, we use the bit-error rate (BER) that is achieved for an uncoded transmission of uncorrelated 16QAM symbols, averaged over both users.
When all eight channels are used, the best uncoded BER is achieved for both transmissions.
The proposed equalizer is evaluated in extremely long sparse and dense Rayleigh fading channels for uncoded BPSK and 16-QAM-modulated systems and remarkable performance gains are achieved.
Fig. 6 Sensitivity of the SER achieved with BD precoding and leakage-bounded beamforming with respect to the channel estimation error for uncoded 16 QAM transmission.
Finally, the bandwidth of each link is assumed to be normalized to 1. Two types of transmissions will be considered: the uncoded and LPDC coded cases with the discrete modulations specified in Tables 1 and 2, respectively.
It is known that uncoded or analog transmission achieves the optimal performance theoretically attainable (OPTA) in MMSE sense when both the source and the channel are Gaussian and memoryless and have the same bandwidths [7].
First, the framework is developed for uncoded -PSK signaling (with ).
