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let xt be a stationary real normal process with zero mean let a new process y t be defined bydetermine the
in an msk signal the initial state for the phase is either 0 or pi rad determine the terminal phase state for the
determine the autocorrelation functions for the msk and offset qpsk modulated signals based on the assumption that the
in on-off keying of a carrier modulated signal the two possible signals are where phi is the carrier phase and nt is
assuming that it is desired to transmit information at the rate of r bitss determine the required transmission
a spacecraft located 100000 km from the earth is sending data at a rate of r bitss the frequency band is centered at 2
a satellite in geosynchronous orbit is used as a regenerative repeater in a digital communication system consider the
suppose that the loop filter see equation 52-14 for a pll has the transfer functiona determine the closed-loop transfer
a dms has an alphabet of eight letters xi i 1 2 8 with probabilities 025 020 015 012 010 008 005 and 0051 use the
a dms has an alphabet of five letters xi i 1 2 5 each occurring with probability 1 5 evaluate the efficiency of a
find the lempel ziv source code for the binary source
design a ternary huffman code using 0 1 and 2 as letters for a source with output alphabet probabilities given by 005
two discrete memory less information sources x and y each have an alphabet with six symbols x y 1 2 3 4 5 6 the
consider the binary-input quaternary-output dmc shown in figure p6571 determine the capacity of the channel2 show that
a telephone channel has a bandwidth w 3000 hz and a signal-to-noise power ratio of 400 26 db suppose we characterize
a discrete memory less channel is shown in figure p6511 determine the capacity of this channel2 determine r0 for this
x is a binary memoryless source with px 0 03 this source is transmitted over a binary symmetric channel with
each sample of a gaussian memory less source has a variance equal to 4 and the source produces 8000 samples per second
a discrete memory less source produces outputs a1 a2 a3 a4 a5 a6 a7 a8 the corresponding output probabilities are 005
a discrete-time memory less gaussian source with mean 0 and variance sigma2 is to be transmitted over a binary
the generator matrix for a linear binary code isa express g in systematic ip formb determine the parity check matrix h
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
letgx x8 x6 x4 x2 1be a polynomial over the binary fielda find the lowest-rate cyclic code with generator
for functions in exercise 38 determine the fixed polarity arithmetic expressions and show that the fprm- repressions