An Enhanced Temporal Compressive Resource Allocation Technique for PLC Systems

Abstract

This work introduces enhanced versions of the temporal compressive resource allocation technique, which is applied for power line communication systems when the periodically time varying behavior of electric power systems is taken into account. The enhancements are accomplished by introducing two changes that increase the effectiveness of the resource allocation process based on rate adaptation. The first change refers to the use of the minimum signal-to-noise ratio of each set of microslots for preventing symbol error rate peaks in some microslots. The second change imposes the use of the normalized signal-tonoise ratio matrix to estimate the correlation among microslots since it is a more reliable parameter to provide such type of information. Numerical results, based on a comparison between the full enhanced version, a partial enhanced version and the original technique, show that both enhanced versions are capable of fulfilling symbol error rate upper bound with reduced data rate loss penalty in comparison to the original one. Also, the use of the normalized signal-to-noise ratio matrix results in higher computational complexity reduction.

Performance Analysis of Orthogonal Multiplexing Techniques for PLC Systems with Low Cyclic Prefix Length and Symbol Timing Offset

“…which is a false statement; hence, ( 13) is also false. (9) reduces to an estimated mapped vector given by…”

“…, I, and G are obtained. Moreover, using (28) and (29) results in the estimated mapped vector and the SINR for the SCCP scheme through (9) and (19), respectively.…”

“…Regarding the PHY layer, it is a well-established fact that the multicarrier scheme known as Hermitian symmetric orthogonal frequency division multiplexing (HS-OFDM), which is the orthogonal frequency division multiplexing (OFDM) version for baseband data communication, is widely applied to deal with the aforementioned power line communication (PLC) impairments. It divides the frequency bandwidth into several subbands (i.e., orthogonal subchannels), which are useful for overcoming the frequency selectivity of PLC channels, and consequently maximizing the data rate or minimizing bit error rate (BER) [6][7][8][9][10][11]. It can even be used with a blanker to mitigate impulsive noise disturbances [12,13].…”