Transmit Diversity & Receive Diversity

Transmit Diversity MISO = Multiple Input Single Output Principle More complex than SISO. 2 or more transmitters and one receiver. MISO is more commonly referred to as transmit diversity. The...
Article Topics :

arq, cell, diversity, enodeb, lte, radio, receive, telecom, transmitt

How to Reverse Access Channel Work in CDMA?

Reverse Access Channel used by MS Initiate Communication or Respond to Paging Channel. A reverse channel is first spread with WALSH to 307.2Kbps and then becomes 1.2288Mcps after long code...
Article Topics :

active, cdma, cdma paging area, CHANNEL, forward, handoff, lai, neighbor, PAGING, pilot, pn, reverse, search window, sim

WCDMA Channelization Code

OVSF Code (Orthogonal Variable Spreading Factor) is used as channelization code Orthogonal codes are easily generated by starting with a seed of 1, repeating the 1 horizontally and vertically, and...
Article Topics :

block, cdma, channelization, channelization code, how create channelization codes, orthogonal, ovsf code, telecom, uplink, wcdma channelization code

Forward Traffic Channel of CDMA

Forward Traffic Channel is used to Transmit Data and Signaling Information. Symbol repetition makes symbol streams at different rates adapted to those at the rate of 19.2k. The original symbol...
Article Topics :

active, cdma, CHANNEL, forward, handoff, interleaving, lai, neighbor, PAGING, pilot, power control, reverse, search window, sim

How Common Control Channel (CCCH) works in GSM ?

RACH(Random Access Channel) Uplink only. Used by the MS when making its first access to the Network. The reason for access could be initiation of a call or a page...
Article Topics :

access, AGCH, ccch, CHANNEL, common channel, downlink, gsm, lte, ms, network, rach, random, uplink, what is common control channel

What is Work of Paging Channel in CDMA?

The paging channel transmits: System parameters message Access parameters Neighbors list CDMA channels list message The paging channel accomplishes: Paging to MS Assign traffic channel to MS The frame length...
Article Topics :

active, cdma, CHANNEL, forward, handoff, lai, neighbor, PAGING, pilot, reverse, search window, sim

How Sync Channel work in CDMA?

A long code is used for scrambling. However, a long code has too long a period, which cannot be wholly used for scrambling. We can only sample some chips of...
Article Topics :

active, cdma, cdma2k long code state sync message lc_state, CHANNEL, forward, handoff, lai, neighbor, PAGING, pilot, pn, reverse, search window, sim

What is Basic work of Pilot Channel in CDMA?

A pilot channel: Assist mobile station to be connected with CDMA network Handles multi-path searching Provide the phase reference for coherent demodulation and help the mobile station estimate the transmission...
Article Topics :

active, cdma, CHANNEL, forward, handoff, lai, neighbor, PAGING, pilot, reverse, search window, sim

Transmit Diversity of CDMA

Diversity technology means that after receiving two or more input signals with mutually uncorrelated fading at the same time, the system demodulates these signals and adds them up. Thus, the...
Article Topics :

active, cdma, CHANNEL, forward, handoff, interleaving, lai, neighbor, PAGING, pilot, rake, reverse, search window, sim

What is T_ADD,T_DROP and T_TDROP in CDMA?

Pilot Detection Threshold (T_ADD) Any Pilot that is strong but is not in the Handoff Direction Message is a source of interference. This Pilot should be immediately moved into the...
Article Topics :

active, cdma, CHANNEL, forward, handoff, lai, neighbor, PAGING, pilot, pn, reverse, search window, sim

LTE Downlink Logical Channel

Paging Control Channel(PCCH) A downlink channel that transfers paging information and system information change notifications. This channel isused for paging when the network does not know the location cell of...
Article Topics :

BCCH, ccch, cell, dcch, downlink, enodeb, logical channel, lte, lte downlink logical channels, mcch, power control, telecom, uplink

List of Uplink and Downlink Physical Channel of WCDMA

Downlink Physical Channel of WCDMA Downlink Dedicated Physical Channel: Downlink DPCH Downlink Common Physical Channel: Common Control Physical Channel (CCPCH) Synchronization Channel ( SCH) Paging Indicator Channel (PICH) Acquisition Indicator...
Article Topics :

ccpch, cdma, cpich, downlink, physical lte, pusc w/ all sc, scch, SCH, telecom, uplink

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