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a total of 30 equal-power users are to share a common communication channel by cdma each user transmits information at
the hadamard n k 2m m1 codes are low-rate codes with dmin 2n-1 determine the performance of this class of codes for
a rate frac12 convolutional code with d free 10 is used to encode a data sequence occurring at a rate of 1000 bitss
consider the concatenation of a reed-solomon 31 3 q 32-ary alphabet as the outer code with a hadamard 16 5 binary code
the sketch in figure p122 illustrates the power spectral densities of a pn spread spectrum signal and narrowband
the rate 13 k 3 binary convolutional code with transfer function given by equation 81-21 is used for transmitting data
consider the set a of all divisors of the number 8 and the binary relation rho over a defined by xrhoy if and only if x
a switching function fx1 x2 x3 has the value 0 at the binary triples where two or more bits have the value 1 and the
analyze the logic network in fig 27 and simplify it by using properties of boolean expressions determine the
recalculate the tow hygrothermal properties of weave type 1 in table 93 using the values of v tow f iber calculated in
suppose that the loop filter see equation 52-14 for a pll has the transfer functiona determine the closed-loop transfer
a radio transmitter has a power output of pt 1 w at a frequency of 1 ghz the transmitting and receiving antennas are
using a symbolic computation program eg mathematica or maple find the weight enumeration polynomial for a 15 11 hamming
when an n k hadamard code is mapped into waveforms by means of binary psk the corresponding m 2k waveforms are
a code c consists of all binary sequences of length 6 and weight 31 is this code a linear block code why2 what is the
solve problem 757 when the received sequence isr 1110000000000000000011101101001problem 757in the bch code designed in
the parity check matrix of a linear block code is given below1 determine the generator matrix for this code in the
determine the generator polynomial and the rate of a triple-error-correcting reed-solomon code with block length n 63
a con volutional code is described by1 draw the encoder corresponding to this code2 draw the state-transition diagram
the convolutional code of problem 81 is used for transmission over an awgn channel with hard decision decoding the
repeat problem 81 for a code withproblem 81a con volutional code is described by1 draw the encoder corresponding to
the block diagram of a binary convolutional code is shown in figure p841 draw the state diagram for the code2 find the
we know that cyclic codes for all possible values of n k do not exist1 give an example of an n k pair for which no
what are the possible rates for cyclic codes with block length 23 list all possible generator polynomials and specify