Determine the required user signal power to achieve ber

Assignment Help Electrical Engineering
Reference no: EM13264497

In a multiuser CDMA system of DSSS, all transmitters are at equal distances from the receivers. The additive white Gaussian noise density Sn(f) = 5x10^-7 W/Hz. BPSK is used by all users with bit rate = 16 kb/s. There are 16 users.

(a) Assuming that the spreading codes Ci for the users are orthogonal, find the desired user power signal Pi to achieve Bit Error Rate = 10^-5.

(b) Now assume that the spreading codes are not orthogonal, specifically: Ri,i = 1 and Ri,j = -1/16; i does not equal j. Determine the required user signal power to achieve the same BER (10^-5).

Reference no: EM13264497

Questions Cloud

Find load resistances of op amps range from a few ohms : The load resistances of op amps range from a few Ohms to a couple of hundred Ohms. What would happen if the load resistance is very low and approaches that of the output resistance of the op amp
What could you do to protect the web server : What could you do to protect the web server, communication channels and databases? What company proprietary information needs to be protected? Does the company develop new software, patent medicine, copyrighted materials such as training, documents, ..
What is the rate of heat flow through the comforter : A student is sleeping under a small goose-down comforter that has coefficient of thermal conductivity of 0.025 W/m °C. what is the rate of heat flow through the comforter
Human resources representative in a large organization : You are the senior Human Resources representative in a large organization with locations throughout the United States. The company has a long history of taking conservative views or positions on social issues. However, as economic compression strengt..
Determine the required user signal power to achieve ber : In a multiuser CDMA system of DSSS, all transmitters are at equal distances from the receivers. The additive white Gaussian noise density Sn(f) = 5x10^-7 W/Hz. BPSK is used by all users with bit rate = 16 kb/s. There are 16 users.
What are the wavelengths of given signals : AM radio signals have frequencies between 550 kHz and 1600 kHz (kilohertz) and travel with a speed of 3.0×108m/s. What are the wavelengths of these signals
Find the new bit error rate in the presence of the jammer : It is decided to apply a Fast Hopping (FH) scheme on the above ASK system. The hopping is made over 12 channels of 100 kHz; or over 1.2 MHz bandwidth. The ASK signal hops 6 bands per bit period. Now a strong jammer randomly jams one of the 12 FH c..
As a percent of gross domestic product : As a percent of gross domestic product (GDP) the U.S. spends about 16%. How does this relate to the other industrialized countries?
Explain the group 12 element whose chemistry is different : Two of the Group 12 elements exhibit very similar chemistries to one another, while the chemistry of the third is somewhat different. Identify the Group 12 element whose chemistry is different from the other two Group 12 elements.

Reviews

Write a Review

Electrical Engineering Questions & Answers

  What is probability that chip selected at the first is blue

A turn contains three blue and seven white chips. A chip is selected at random. If the color of the chip selected is white, it is eplaced and two more white chips are added to the urn.

  Calculate the series resistance of the led

GaAs LED emitting surface size is 180 um by 180 um. The doping levels are NA = 9 E+15 cm-3 and ND = 5 E+17 cm-3. The n-layer is 70 um thick, and the p-layer is 8 um thick.

  Find the expression for critically damped voltage response

The initial voltage across the capacitor is 5V and the initial current through the inductor is 100 mA. A switch is thrown at t=0 such that the circuit is connected in parallel with a 50 mA independent current source.

  What is the resulting maximum information transfer rate

The serial ports on two computers which use binary signaling are connected by a twisted pair cable. The cable has a flat frequency response up to 120KHz, with negligible group delay distortion. That is, the bandwidth of the cable is 120KHz.

  Discuss the rise time-the overshoot and the settling time,

In the movement of a robot arm, the arm is commanded to go from position 1 to position 5. Discuss the rise time, the overshoot, the settling time, and the steady-state error as it applies to the movement of a robot arm

  Find maximum value that angle can reach during the fault

A three-phase fault occurs at the generator terminals causing the angle of part (c) to increase. The fault is subsequently cleared. Find the maximum value that this angle can reach during the fault (i.e. the critical clearing angle) so that the ge..

  Which consists of an infinitely thin cylindrical shell of r

The return current is through the outer conductor, which consists of an infinitely thin cylindrical shell of radius b. Use Ampere's law to calculate the magnetic field intensity everwhere.

  Intelligent fan controller based on temperature

Need the coding for the circuits and its a intelligent fan controller based on temperature?

  What register is used to keep track of the return point

What happens to the program counter (PC) when a subroutine is called. What register is used to keep track of the return point. What happens to the register that keeps track of the return point if a subroutine calls another subroutine

  How many samples of actual data are needed to resolve signal

a) Based on your decision create a sampled signal of the sum of the two sines, and plot the magnitude of the zero centered FFT with property frequency annotation. Did it work Check with the data tip tool.

  Write a program to generate a 25-hz digital waveform

Write a program to generate a 25-Hz digital waveform with a 50 percent duty cycle on the PT0 pin as long as the voltage level on the PP7 pin is high. Your program should consist of two parts: Entry test. As long as the PP7 pin is low, it stays in t..

  Calculate the instantaneous power absorbed by the resistor

A voltage v(t) = 359.3 cos(wt) is applied to a load consisting of a 10 resistor in parallel with a capacitive reactance XC = 25. Calculate The instantaneous power absorbed by the resistor The instantaneous power absorbed by the capacitor

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd