Consider a channel that can only send on bit at a time, with a bit rate of 4 bits/sec and a cutoff frequency of 50000 Hz. Given a frame of 256 bits, what is the number of the highest harmonic passed through? See sec. 2.1.2. |
Consider a channel that can only send on bit at a time, with a bit rate...
new defined PCM system is going to be employed to send 2 MByte of data. Samp rate to be used is 50% higher than Nyquist rate. Referring to the frame structure given calculate the following. Frame Structure Number of channel = 32 Number of bits in one time slot = 8 32 channels = 1 frame Number of bits in a frame = 32 x 8 = 256 bits This frame must be transmitted within the sampling period i. Sampling...
A binary waveform with a bit rate of 5818 bits/sec is passed through a system with equivalent transfer function given by the raised cosine Nyquist filter with cutoff 5269 Hz. What is the rolloff factor, r, of the raised cosine filter? State your answer to two decimal places.
4. If an asynchronous frame is used to send ASCII characters in the form of bytes (8 bits), what is the shortest time it could take to send 1000 characters if each bit in a frame is 1 msec long? 5. Suppose an asynchronous frame holds 8 bits of data, a parity bit, and two stop bits (it could happen). Calculate the efficiency of the communication system. Suppose a synchronous frame has 16 bits of non-data in the front and...
Frequency multiplication. Sample x(t) = cos 3πt at the rate of 4 Hz and send impulse samples through an ideal low-pass filter with the cutoff frequency at fc and gain = 1/4. Find and plot the Fourier transform of the reconstructed signal z(t) and its time expression for fc = 2, 3, 4, 5, 6 Hz.
Consider a noisy communication channel, where each bit is flipped with probability p (the probability that a bit is sent in error is p). Assume that n−1 bits, b1,b2,⋯,b(n−1), are going to be sent on this channel. A parity check bit is added to these bits so that the sum b1+b2+⋯+bn is an even number. This way, the receiver can distinguish occurrence of odd number of errors, that is, if one, three, or any odd number of errors occur, the...
i) The telephone line has 3400 Hz bandwidth. What is the maximum bit rate we can send using each of the following methods? Assume d=0 and no noise: ASK QPSK 16-QAM 256-QAM ii) Calculate the bit rate for the given baud rate and type of modulation: 1500 baud, FSK 1500 baud, ASK 1500 baud, QPSK 1500 baud, 16-QAM
A system is sampling a high-frequency signal using an external 16-bit ADC connected to a 5. microcontroller using an SPI bus. The ADC returns a 16-bit sample every time that the SPI bus Poes active. The SPI bus is configured to send 16 bits at a time and runs with a 500,000 Hz clock Determine the maximum sample rate that can be achieved using the ADC connected to the microcontroller using this SPI bus. Assume that the clock must be...
Please, answer all the parts of the question. The subject is Networking. Consider a 1-Mbps satellite channel. Frame length is 1000 bits and the probability of an unsuccessfiul frame transmission is P. Assume that the errors on different frames are independent. Neglect acknowledgment transmission time and receiver processing time and assume a sliding window protocol, using the selective-repeat ARQ method of error recovery. Assume t-50x10° seconds (a) What is the average number of transmission per frame N Assume P 0.01...
Problem 1: Consider the following time-invariant channel impulse response td and T are constants. a- Plot this impulse response and show the delay of each path. b- Find the power delay profile for this given channel. c- Find the rms delay spread by using the power delay profile d-Find the coherence bandwidth of this channel (assume 90% e- Find the frequency response of this channel and plot it f- If we send a pulse shown below with a duration of...
1. A mono audio signal has a bit rate (sampling rate times bits per sample) of 35 MB/sec. How many seconds of such audio can be stored on a CD of 700 MB? 2. An audio signal is sampled at a rate of 256 samples per second and 8 bits are assigned to each sample. Calculate the file size of 4 seconds of stereo audio. 3. Following is(are) advantages of digital audio as compared to analog audio duplication flexibility environmental...