Communications ...

For a rate 1/3 repetition code, the generator matrix is:

Consider the following statement regarding multiple access techniques.

(I) In FDMA each user is assigned a unique frequency which can be shared

(II) In TDMA a single frequency is shared with several users and all transmit in different slots per time

Choose the correct option

A parity check code has the parity check matrix

\(\left[ H \right] = \left[ {\begin{array}{*{20}{c}}1&1&0&1&1&0&0\\1&1&1&0&0&1&0\\0&1&1&1&0&0&1\end{array}} \right]\) 

If the hamming distance in code is 5, then the maximum number of errors correctable is:

A cellular operator is allocated 12.5 MHZ for each simplex band and if total spectrum allocation (B_t) = 12.5 MHz and guard Band (B_guard) = 10KHz. and channel bandwidth is 30kHz. Then the number of channel available in FDMA is _________.

For a linear (6, 3) code whose parity matrix is given which statement is true

\(T = \left[ {\begin{array}{*{20}{c}} 1&1&0\\ 1&1&1\\ 1&0&1 \end{array}} \right]\)

A CDMA system is designed based on DS spectrum with processing gain of 1000 and BPSK modulation scheme. If user has equal power and desired level of SNR is 10.5 dB, the number of users will be

A GSM uses 25 MHz for forward link which is divided into ratio channels of 200 kHz. If 8 speech channel are supported on a single radio channel and if there are no guard bands. Then the number of users that can be accommodated are _________

The number of rows and columns in the parity check matrix for a (15, 11) signal error-correcting codes, will be respectively: