tutorial-2_semA2023_student

Given that the base address is FoH. 1. Create a new asm project “Lab2_Q1.asm". Assume that port A of 8255A PPI is connected to 8085. Write assembly code to send the value of FFH to FoH. Enter a delay of 2 ms for each transmission.

Q.3) You want to transmit the message &$ a. Encode this textual message into a sequence of bits, using 6-bit ASCII coding, followed by a seventh bit for error detection, per character. The seventh bit is chosen so that the total sum of bits using XNOR gate is zero How many total bits are there in the message? b. Assuming the bit duration 10 ms, plot the Dicode RZ line code. c. Assuming the bit duration = 10 ms, plot the Bi--M code. d. Assuming the bit duration 10 ms, plot the Miller line code.

3. Some GPS receivers use 1 bit ADCS (Analog-to-digital Converters) to sample and quantize the signal i.e. the output of the ADC is simply 2 quantization levels: -1 or +1. This is typically done to save on power. (a) What is the quantization SNR? How does it compare to typical thermal noise SNR of a GPS signal before correlating with the CDMA code? (b) Justify, how come it is possible to sample the signal using a single bit and still get good performance.

The following data are transmitted in a serial communication system (P is the parity bit). What parity is being used in each case? a. ABCDEFGHP = 010000101 b. ABCDEFGHP = 011000101 c. ABCDP = 01101 d. ABCDEP = 101011 e. ABCDEP = 111011

Answer in text format only!!

(3) Five telemetry signals, each of bandwidth 1kHz, are to be transmitted simultaneously by binary PCM. The maximum tolerable error in sample amplitudes is 0.2% of the peak signal amplitude. The signals must be sampled at least 20% over the Nyquist rate. Framing and synchronizing require an additional 0.5% extra bits. Determine the minimum possible data rate that must be transmitted, and the minimum bandwidth required to transmit this signal.

Plz solve it

A PCM-TDM system multiplexes 24 voice-band channels. Each sample is encoded into seven bits, and a framing bit is added to each frame. The sampling rate is 10000 samples per second. BPRZ-AMI encoding is the line format. Determine the line speed in bits per second. Upload

a) i) Determine the number of bits per level required when using FSK with 4 different frequencies and QAM with a constellation of 256 points. ii) We want to digitise a signal that contains frequencies between 100 Hz and 1500 Hz, assuming 16 bits per sample. The digitised signal will be transmitted using a QPSK process. Determine the bit rate and the level rate. iii) We need to send 210,000 bits per second over a noiseless channel using 128- QAM. Determine the required bandwidth.

4. The binary sequence 101010111101010100001111 is applied to the DPSK transmitter, by using two different differentially encoded sequences (Hint by changing the arbitrary value 0 and 1): a. Sketch the resulting waveform at the transmitter output. b. By applying each of these waveforms to the DPSK receiver, show that, in the absence of noise, the original binary sequence is restricted at the receiver output.

This elementary problem begins to explore propagation delay and transmission delay, two central  Concepts in data networking. Consider two hosts, A and B, connected by a single link of rate R Suppose that the two hosts are separated by m meters, and suppose the propagation   along the link is s meters/sec. Host A is to send a packet of size L bits to Host B. Express the propagation delay, dprop, in terms of m and Determine the transmission time of the packet dtrans, in terms of L and Ignoring processing and queuing delays, obtain an expression for the end--‐to--‐ end delay. Suppose Host A begins to transmit the packet at time t=0. At time t=dtrans, where is the last bit of the packet? Suppose dprop is greater than dtrans. At time t=dtrans, where is the first bit of the packet? Suppose dprop is less than dtrans. At time t=dtrans, where is the first bit of the packet? Suppose s=2*109, L=1024 bits, and R=256 Find the distance m so that dprop equals dtrans.