symmap
Maps a binary sequence to a symbol sequence
Calling sequence
x = symmap(b,k[,enc])
x = symmap(b,k[,enc])
Parameters
- b:
Input binary sequence (must be a vector of 0.0 and 1.0)
- k:
Number of bits / symbol
- enc:
Specify binary ('b', default), phase ('p'), or qam ('q') encoding
- x:
Output symbol vector (real or complex)
Input binary sequence (must be a vector of 0.0 and 1.0)
Number of bits / symbol
Specify binary ('b', default), phase ('p'), or qam ('q') encoding
Output symbol vector (real or complex)
Description
Maps a binary sequence (sequence of 0 or 1) to a sequence of symbols, using one of the following possible encodings:
- Binary encoding (PAM / NRZ) /
enc = 'b': produces a vector of real symbols, uniformly distribued between -1 and 1 (if k = 2, only -1 and 1 are produced, e.g. NRZ encoding). - Phase encoding (PSK) /
enc = 'p': produces complex symbols of unit magnitude and uniformly distribued phase between 0 and
radians (for k = 1 bit/symbol, this is BPSK, which symbols are identical to NRZ, for k = 2 bits/symbol, this is QPSK, ...). - Quadrature amplitude Encoding (QAM) /
enc = 'q': produces complex symbols where real and imaginary parts of the signal are independently modulated using each one half of the bitstream.
Example
x1 = symmap([0 1 0 0], 1, 'b') // NRZ encoding x2 = symmap([0 1 0 0], 2, 'p') // QPSK encoding |