How QPSK & BPSK Modulation in WCDMA?

A data-modulation scheme defines how the data bits are mixed with the carrier signal, which is always a sine wave. There are three basic ways to modulate a carrier signal...
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ask, bit, carrier, cdma, cell, digital, fsk, modulation, phase, psk, signal, telecom, where bpsk modulation scheme are used

WCDMA Modulation

Different modulation methods corresponding to different transmitting abilities in air interface. R99/R4: QPSK HSDPA: QPSK or 16QAM The UTRAN air interface uses QPSK modulation in the downlink, although HSDPA may...
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air interface, amplitude, cdma, cdma modulation, hsdpa, modulation, qam, qpsk, signal, telecom, wcdma modulation, wcdma modulation qam

Processing Procedure of WCDMA System

Source coding can increase the transmitting efficiency. Channel coding can make the transmission more reliable. Spreading can increase the capability of overcoming interference. Through the modulation, the signals will transfer...
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Processing Procedure of WCDMA Systemcdma, CHANNEL, chip, coding, interleaving, modulation, signal, spreading, telecom

Correlation in WCDMA

How Correlation works in WCDMA ? Correlation measures similarity between any two arbitrary signals. Identical and Orthogonal signals: Correlation is used to measure similarity of any two arbitrary signals. It...
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Correlation in WCDMA, wcdma basic, signalling, telecom wcdma techniquescdma, correlate in wcdma, correlation, multiplying, orthogonal, signal, telecom, WCDMA / 3G


If some knowledge of the downlink channels of the different transmit antennas, (more specifically some knowledge of the relative channel phases) is available at the transmitter side, multiple transmit antennas...
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BEAMFORMING in LTEantenna, beamforming, channels, downlink, lte, pn, receiver, signal, telecom, transmit

Inter-Carrier Interference for OFDM

The price for the optimum subcarrier spacing is the sensitivity of OFDM to frequency errors. If the receiver’s frequency is some fractions of the subcarrier spacing (subcarrier bandwidth) then we...
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cost, frequency, interference, ofdma, ppm, receiver, signal, subcarrier, telecom, transmitter

OFDM implementation in Detail

A typical OFDM transmitter is shown on the following figure. To reduce the amount of RF hardware required for OFDM the modulation process is split into two parts. A first...
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dac, filter, generator, hardware lte, lte, ofdm idft, ofdma, recevier, sampling, signal, spreading, subcarrier, symbol, telecom, transmitter, wave

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