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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
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