Impact of diversity, Electrical Engineering

Both GSM and DECT use GMSK, but with different Gaussian filters (BGT = 0.3 in GSM, BGT = 0.5 in DECT). What are the advantages of having a larger bandwidth time product? Why is the lower ones used in GSM?

A system should transmit as high a data rate as possible within a 1-MHz bandwidth, where to use MSK or BPSK with root-raised cosine filters with α = 0.35? Note: this question concentrates on spectral efficiency, and avoids other considerations like the peak-to-average ratio of the signal.

Consider a point-to-point radio link between two highly directional antennas in a stationary environment. The antennas have antenna gains of 30 dB, distance attenuation is 150 dB, and the RX has a noise figure of 7 dB. The symbol rate is 20M symb/s and Nyquist signalling is used. It can be assumed that the radio link can be treated as an AWGN channel without fading. How much transmit power is required (disregarding power losses at TX and RX ends) for a maximum BER of 10-5.

(a) When using coherently detected BPSK, FSK, differentially detected BPSK, or noncoherently detected FSK. 

(b) Derive the exact bit and symbol error probability expressions for coherently detected Gray-coded QPSK. Start by showing that the QPSK signal can be viewed as two antipodal signals in quadrature.

(c) What is the required transmit power if Gray-coded QPSK is used?

(d) What is the penalty in increased BER for using differential detection of Gray- coded QPSK in (c)?

Posted Date: 2/27/2013 1:21:41 AM | Location : United States

Related Discussions:- Impact of diversity, Assignment Help, Ask Question on Impact of diversity, Get Answer, Expert's Help, Impact of diversity Discussions

Write discussion on Impact of diversity
Your posts are moderated
Related Questions
Microcontroller Microcontroller  is also known  as computer  on a chip  this  includes basic  features of microprocessor (ALU Registers  and control circuits ) with  1 k to 2k

i need help solving an electrical circuit, using kirchoffs laws, it a diamond shape with one voltage source

Q. Show that any amplifier represented by the model of Figure of the text can also be represented by themore general hybridmodel of Figure. Evaluate the four parameters of the hybr

connect two given points A and B by a parabolic curve when OA=60mm,OB=80mm and angle AOB=110 degree

Q. Basic Operation of  P-channel enhancement MOSFET? In the fabrication of a p-channel depletion field-effect transistor, the gate is insulated from the channel. Therefore, the

Singles Phase  Half wave Controlled Rectifier  with RL Load When gate pulses are applied to the thyristor  at output voltage  v0 follows the input voltage  v s ( = V m sin ) s

We are given an M=32 pulse sequence of slow time data, collected with PRF = 10 kHz.  We want to use a Cooley-Tukey radix 2 FFT algorithms to compute the Doppler spectrum of the dat

Explain Lithography. Lithography - This is one of the processes which is carried out throughout manufacture of integrated circuits. Silica oxide (SiO 2 ) layer is thermally

By means of nodal analysis, find the current delivered by the 10-V source and the voltage across the 10- resistance in the circuit shown in figure.

Explain Register Direct and Indirect data addressing mode (with examples) available in microprocessors. Register Direct Modes and Register Indirect Modes: Does not giv