System, method and apparatus for Multi-Band Faster-than-Nyquist scheme-based communication

A receiver comprising:

• a signal down-converter configured to down convert a received digital multiband (DMB) signal sDMB(t) into a plurality of baseband signals r1(t), r2(t), . . . rn(t) associated with a plurality symbol subsets a1[p], a2[p] . . . an[p] respectively, where p is an index of a symbol in the symbol subsets a1[p], a2[p] . . . an[p], and n is an integer value defining a total number of the plurality of baseband signals r1 (t), r2(t), . . . rn(t) and a total number of the plurality symbol subsets a1[p], a2[p] . . . an[p];
• a controller configured to:
• segregate the plurality of baseband signals r1(t), r2(t), . . . rn(t) in accordance with a manner by which the plurality symbol subsets a1[p], a2[p] . . . an[p] have been processed by a transmitter,
• forward a first portion of the plurality of baseband signals r1(t), r2(t), . . . rn (t) to a minimum mean square error (MMSE) based receiver for further processing, and
• forwarding a second portion of the plurality of baseband signals r1(t), r2(t), . . . rn(t) to a matched filter-based receiver for further processing;
• and
• a combiner configured to combine an output of the MMSE based receiver and matched filter-based receiver to generate an equivalent symbol dataset a′[m] representative of a transmitted symbol dataset a[m], where m is an index of a symbol in the symbol dataset a′[m].

A method of communication comprising:

• splitting, by a data separator, a symbol dataset a[m] into symbol subsets a1[p], a2[p] . . . an[p], where m is an index of a symbol in the symbol dataset [m] and p is an index of a symbol in the symbol subsets a1[p], a2[p] . . . an[p];
• modulating, by a plurality of root raised cosine (RRC) pulse generators, the symbol subsets a1[p], a2[p] . . . an[p] using different sub-carriers, roll off factors and time acceleration factors, wherein the modulation is based on a Faster-than-Nyquist (FTN) scheme;
• performing frequency shifting, by a plurality of frequency shifters, on the modulated symbol sub sets a1[p], a2[p] . . . an[p];
• combining, by an adder, the frequency shifted and modulated symbol subsets a1[p], a2[p] . . . an[p] to generate a digital multiband (DMB) signal sDMB(t) to be transmitted over a communication channel;
• transmitting, by a transmitter, the DMB signal sDMB(t) over the communication channel;
• receiving, by a receiver, the DMB signal sDMB(t) transmitted over the communication channel;
• down converting, by a signal down-converter, the received DMB signal sDMB(t) into a plurality of baseband signals r1(t), r2(t), . . . rn(t) associated with the symbol subsets a1[p], a2[p] . . . an[p] respectively, where n is an integer value defining a total number of the plurality of baseband signals r1(t), r2(t), . . . rn(t) and a total number of the symbol subsets a1[p], a2[p] . . . an[p];
• segregating, by a controller, the plurality of baseband signals r1(t), r2(t), . . . rn(t) in accordance with a manner by which the symbol subsets a1[p], a2[p] . . . an[p] have been processed before transmission;
• forwarding, by the controller, a first portion of the plurality of baseband signals r1(t), r2(t), . . . rn(t) to a minimum mean square error (MMSE) based receiver for further processing;
• forwarding, by the controller, a second portion of the plurality of baseband signals r1(t), r2(t), . . . rn(t) to a matched filter-based receiver for further processing;
• and
• combining, by a combiner, an output of the MMSE based receiver and matched filter-based receiver to generate an equivalent symbol dataset a′[m] representative of the symbol dataset a[m], where m is an index of a symbol in the symbol dataset a′[m].