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a satellite in synchronous orbit is used to communicate with an earth station at a distance of 40000 km the satellite
consider a linear block code with code words 0000 1010 0101 1111 find the dual of this code and show that this code is
find the generator and the parity check matrices of a second-order r 2 reed-muller code with block length n 16 show
c is a 6 3 linear block code whose generator matrix is given by1 what rate minimum distance and the coding gain can c
a 6 3 systematic linear block code encodes the information sequence x x1 x2 x3 into codeword c c1 c2 c3 c4 c5 c6 such
the polynomialgx x4 x 1is the generator for the 15 11 hamming binary codea determine a generator matrix g for this
use the transfer function derived in problem 88 for the rc 12 k 3 convolutional code to compute the probability of a
draw the state diagram for the convolutional code generated by the encoder shown in figure p819 and thus determine
a trellis-coded signal is formed as shown in figure p820 by encoding 1 bit by use of a rate 12 convolutional code while
the block diagram for a convolutional encoder is shown in figure p8121 what is the number of states for this code2
a k 1 k 3 and n 2 convolutional code is characterized by g1 001 and g2 1011 draw the state diagram for the
consider the transmission of data via pam over a voice-band telephone channel that has a bandwidth of 3000 hz show how
a microwave radio channel has a frequency responsec f 1 03 cos 2pi f tdetermine the frequency-response
in a binary pam system the clock that specifies the sampling of the correlator output is offset from the optimum
in line-of-sight microwave radio transmission the signal arrives at the receiver via two propagation paths the direct
a pulse and its raised cosine spectral characteristic are shown in figure p953 this pulse is used for transmitting
a binary antipodal signal is transmitted over a non ideal band-limited channel which introduces isi over two adjacent
consider the use of a square-root raised cosine signal pulse with a roll-off factor of unity for transmission of binary
a ds spread spectrum system transmits at a rate of 1000 bitss in the presence of a tone jammer the jammer power is 20
determine the error probability for an fh spread spectrum signal in which a binary convolutional code is used in
a slow fh binary fsk system with noncoherent detection operates at ebj0 10 with a hopping bandwidth of 2 ghz and a bit
consider the fh binary orthogonal fsk system described in problem 1215 suppose that the hop rate is increased to 2
in a fast fh spread spectrum system the information is transmitted via fsk with noncoherent detection suppose there are
a cdma system is designed based on ds spread spectrum with a processing gain of 1000 and binary psk modulation
a total of 30 equal-power users are to share a common communication channel by cdma each user transmits information at