Spectrum Analysis of Spreading & Dispreading in WCDMA-3G

How Spreading & Dispreading in WCDMA-3G ? Traditional radio communication systems transmit data using the minimum bandwidth required to carry it as a narrowband signal. CDMA system mix their input…

Transmit Diversity Gain in LTE

Transmit diversity gain can be used when transmitting broadcast information from multiple antennas. This effectively produces, by design, frequency diversity in the transmitter. The gain obtained from transmit diversity can…

MULTIPLE ANTENNA TECHNOLOGY IN LTE

The use of multiple antenna technology allows the exploitation of the spatial domain as another new dimension. This becomes essential in the quest for higher spectral efficiencies With the use…

BEAMFORMING in LTE

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…

LTE SC-FDMA and LTE Uplink

Introduction to SC-FDMA and uplink frame structure Marriage of single carrier transmission and FDMA Uplink SC-FDMA tranmsit and receive chains Peak to Average Power Ratio (PAPR) comparison with SC-FDMA and…

LTE Parameters and Downlink Modulation

LTE parameters and frequency bands What is OFDMA? OFDMA multiple access and downlink frame structure OFDMA transmit and receive chains