Consider a CDMA system with two users A and B. and their spreading sequences are a-[1,1, 1] and b- [1, 1,-1). respectively. Assume that the path loss factors for user A and user 8 are 1 and 5. respectively. BPSK modulation is employed. User A transmitted a bit d, -1 and user B transmitted a bit de --1. The received signal (distorted by noise) is r--5,-4,5). If successive cancellation is used for decoding which of the following statements is true? Select one Oa After interference cancellation. we can get a signal vector |-6,-5, 4. O Ater interference cancellation we can get a signal vector-[1. 1, 0). Oe Successive cancellation is performed in decoding User B's signal Od None of these choices is true Oe Ater interference cancellation we can get a signal vector (0, 1,0

Consider a CDMA system with two users A and B. and their spreading sequences are a-[1,1, 1] and b- [1, 1,-1). respectively. Assume that the path loss factors for user A and user 8 are 1 and 5. respectively. BPSK modulation is employed. User A transmitted a bit d, -1 and user B transmitted a bit de --1. The received signal (distorted by noise) is r--5,-4,5). If successive cancellation is used for decoding which of the following statements is true? Select one Oa After interference cancellation. we can get a signal vector |-6,-5, 4. O Ater interference cancellation we can get a signal vector-[1. 1, 0). Oe Successive cancellation is performed in decoding User B's signal Od None of these choices is true Oe Ater interference cancellation we can get a signal vector (0, 1,0

Operations Research : Applications and Algorithms

4th Edition

ISBN:9780534380588

Author:Wayne L. Winston

Publisher:Wayne L. Winston

Chapter20: Queuing Theory

Section20.10: Exponential Queues In Series And Open Queuing Networks

Problem 8P

See similar textbooks

Similar questions

Unless specified otherwise, use the free space propagation speed of light 3x108 m/s to calculate the propagation delay. For numerical calculations, the results must show the appropriate unit. Show a complete solution for each problem3. Consider a digital multimedia transmission system. Separate audio and video coders are used to encode these signals. Audio and video bits are packed in packets together and transmitted over a transmission link. Each packet is 2,000 bytes long, which includes a 48-byte header. The system generates one packet every 40 ms. Calculate the following values:a. The minimum data transmission rate required to support the above system.b. The minimum signal-to-noise ratio (SNR) in dB required to transmit the above audio and video information. Assume a 400-kHz transmission channel bandwidth is used.c. The end-to-end packet delay over a 50-km link, using answer in Part a).
I A channel has a frequency range between 3 KHz and 14 KHz. The SNR in this channel is 25 dB. Find the maximum Bit rate of the channel and the Signal levels. [3 marks] For a bit stream "0 1 1 0 0 1 0 1", sketch the waveforms for (i) NRZ-I - (Assume the initial level at time zero is Low) (ii) NRZ-L - (assume 0 as High and 1 as Low) (iii) RZ Encoding – (Assume the initial level at time zero is Low) [3 marks]
Consider a 1Mbps transmission channel. The clock at the receiver has a drift of 1 second in one year. How long asequence of bits (or frame) can be sent before the clock drift could cause a problem? Assume that the sender and receiver are synchronized at the beginning of each frame and that they cannot resynchronize during the frame. Also, assume that the receiver samples the received signal at the middle of each bit duration to detect if it is 0 or 1.
Consider a channel with bandwidth B = 2Mhz and a signal to noise ratio of 40dB (expressed in log scale, remember the conversion!). What is the maximum data rate achievable? Explicitly mention the theorem and the calculation that lead to the solution.
Data communication Suppose that the spectrum of a channel is between 8 MHz and 10 MHz, and the intended capacity is 8 Mbps. a. What should be the signal-to-noise ratio (SNR) to obtain this capacity? Constant values= c=3x^10°m/s, k=1,38x^10231/K I
Suppose analog signal has the bandwidth of 15 kHz (uniform). Find the minimum first null bandwidth (square wave pulses) at which it would be possible to transmit a PCM signal while maintaining average SNR of at least 58 dB. Assume Vpeak = 5V.
Q3// A given FM transmitter is modulated with sinusoidal input (in volt), m(t)= 25 cos800 t, and the modulation index is (5). The un-modulated carrier power is (150Watt) across 2002 resistive load. Determine: 1. The modulation constant, K₁. 2. The approximate bandwidth of FM signal. 3. The peak amplitude of the first order lower sideband. 4. The ratio of the average power in the sum of the second and fourth sidebands to power in all the remaining sidebands excluding carrier
Example 1: The voice signal with maximum frequency of 3KHZ . is to be transmitted with a sampling frequency and the pulse duration t = 0.1Ts . find the required bandwidth of PAM?
Consider a communication channel with bandwidth B = 8000 Hz. Suppose the channel has a signal-to-noise ratio S/N = 541. What is the maximum data rate of this channel? ? What is the minimum number of signal levels needed to achieve a data rate of 64000 bps?
Q3.Unless specified otherwise, use the free space propagation speed of light 3x108 m/s to calculate the propagation delay. For numerical calculations, the results must show the appropriate unit. Show me a complete solution NOT THE AI SOLUTION. Consider a digital multimedia transmission system. Separate audio and video coders are used to encode these signals. Audio and video bits are packed in packets together and transmitted over a transmission link. Each packet is 2,000 bytes long, which includes a 48-byte header. The system generates one packet every 40 ms. Calculate the following values:a. The minimum data transmission rate required to support the above system.b. The minimum signal-to-noise ratio (SNR) in dB required to transmit the above audio and video information. Assume a 400-kHz transmission channel bandwidth is used.c. The end-to-end packet delay over a 50-km link, using answer in Part a).
Fill in the blanks: The North American Analog Cellular Radio System uses FM with channels 30kHz wide. Suppose such a channel were used for digital communication. If the available signal to noise ratio is 20 dB, calculate the maximum theoretical bit rate and the corresponding baud rate using (a) a two level code and (b) a four level code. (a) and and
Suppose there is a b+n (Sum of first and last digit of your Reg#) Mbps microwave link between a geostationary satellite and its base station on Earth. Every minute the satellite takes a digital photo and sends it to the base station. Assume a propagation speed of 2.4*108 meters/sec. 1. What is the propagation delay of the link? 2. What is the bandwidth-delay product?