# Copyright (c) IMToolkit Development Team
# This toolkit is released under the MIT License, see LICENSE.txt
import itertools
import numpy as np
from .Modulator import Modulator
from .IMUtil import convertIndsToMatrix, getIndexes
[docs]class IMCode(object):
def __init__(self, dm, M, K, Q, modtype, L, meanPower):
mod = Modulator(modtype, L)
kfoldsymbols = np.array(list(itertools.product(mod.symbols, repeat = K))).T
self.inds = getIndexes(dm, M, K, Q)
Q = len(self.inds)
indsm = convertIndsToMatrix(self.inds, M)
self.codes = np.matmul(indsm, kfoldsymbols / np.sqrt(K))
self.codes *= np.sqrt(meanPower) # the mean power is normalized to meanPower
self.codes = np.array(np.hsplit(np.hstack(self.codes), Q * kfoldsymbols.shape[1])) # Nc \times M \times 1
self.B1 = np.floor(np.log2(Q))
self.B2 = int(K * np.log2(L))
self.B = self.B1 + self.B2
[docs] def putRate(self):
print("B = B1 + B2 = %d + %d = %d [bit/symbol]"%(self.B1, self.B2, self.B))
