Consider a TDMA cellular system: a) The total system bandwidth is 50 MHz; b) FĎD is used; c) Each TDMA channel occupies 500 kHz; d) A frame has 10 time slots. What is the number of two-way voice channels?
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- State a bit rate and maximum number of channels in T-1 and T-3 telephone TDM system.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.In GSM, there are 8 separate time slots that makeup what is known as a “TDMA frame’’. Each GSM time slot lasts for 577 µs (microseconds) and contains more than simply a sample of each individual signal. How many bits for control purposes are in one TDMA frame?
- Consider a CDMA system where transmitter A has the code 101010 and transmitter B has the code 111001. Assume that 1 is represented by +1V and 0 is represented by -1V. Show that the two CDMA codes (after mapping them to voltages) are orthogonal to each other. What is transmitted if A sends a bit of 0 and B sends a bit of 1? What did A and B most likely transmit if the received word is “-1 -1 -1 +1 +1 +1”?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 = 111011Explain how adaptive modulation works in communications systems using an illustration?
- In a TDMA system, the number of overhead bits and the number of total bits are 332 bits and 1250 bits. What will be the efficiency of the system?2. (a) Answer the following questions in more than two lines. i) What type of signals do a WDM use? ii) When to use WDM and what is the main component used in it to do the multiplexing and demultiplexing? iii) Can a TDM multiplex the type of signals used in a WDM? Explain your answer in one line.Don't need to elaborate the answer. Just write down the correct answer. Some questions may have multiple answers. 1) Which multiplexing technique shifts each signal to a different carrier frequency? a) FDM b) TDM c) WDM d) PDM 2) Which multiplexing technique involves signals composed of light beams? a) FDM b) TDM c) WDM d) PDM 3) We need an addressing mechanism in a) Satic b) Parallel c) Synchronous d) Statistical 4) Pulse stuffing is a strategy used in a) TDM b) FDM c) FHSS d) WDM 5) a) FDM b) TDM technique uses multiple carrier frequencies. c) WDM d) FHSS e) DSSS TDM. 6) We need to use synchronous TDM and combine 20 digital sources, each of 100 Kbps. Each output slot carries 1 bit from each digital source, but one extra bit is added to each frame for synchronization. Answer the following questions: i) What is the size of an output frame in bits? a) 10 b) 20 c) 21 d) 11 ii) What is the output frame rate? a) 200000 frames/sec b) 210000 frames/sec c) 10000 frames/sec d) 100000…
- Explain block schematic of TDM?3. Determine the implementation complexity of Time - Space (TS) switch where the number of Time Division Multiplexing input lines N = 65. Assume each input line contains a single DS1 signal (24 channels) and one stage matrix is used for space stage.Two M-QAM modulation schemes, 16-QAM and 64-QAM, having equal error performance (I.e same value of Pbe). SNR-13 dB 16-QAM system. Calculate the E/N, in 64-QAM system. Compare the results. What are the maximum transmission rate (free from ISI problem) in both modulation schemes? Assume B=20 kHz.