Description Usage Arguments Value See Also Examples
Receives a vector of bits (1's and 0's). The received vector is mapped to an in-phase (real) and quadrature (imaginary) 16-QAM (4 bit) symbol according to a a Binary Reflective Gray Code (BRGC, see reference). Each symbol has an average symbol energy Es = 10, where in-phase and quadrature constellation points take on values -3, -1, +1, +3, respectively. The bit to symbol mapping is illustrated in the following constellation diagram.
-3+3i | -1+3i | +1+3i | +3+3i |
(1000) | (1001) | (1011) | (1010) |
-3+1i | -1+1i | +1+1i | +3+1i |
(1100) | (1101) | (1111) | (1110) |
-3-1i | -1-1i | +1-1i | +3-1i |
(0100) | (0101) | (0111) | (0110) |
-3-3i | -1-3i | +1-3i | +3-3i |
(0000) | (0001) | (0011) | (0010) |
Reference: E. Agrell, J Lassing, E. Strom, and T. Ottosson, Gray Coding for Multilevel Constellations In Gaussian Noise, IEEE Transactions on Communications, Vol. 53, No. 1, January 2007
1 | f16qammod(bits, Ns = 1, p = 1)
|
bits |
received vector of bits (0's and 1's). |
Ns |
N samples per symbol (default, Ns = 1) |
p |
a vector defining the pulse shape of the transmitted waveform (default, p = 1) |
Returns a complex vector of 16-QAM symbols. If Ns > 1 then the returned signal is shaped with pulse shape, p.
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