What is P CPICH?
What is P CPICH?
CPICH stands for Common Pilot Channel in UMTS and some other CDMA communications systems. Crucially this allows to UE to reduce the set of possible Primary Scrambling Codes being used for P-CPICH to only 8 from 512 choices.
Which duplexing used in WCDMA?
UMTS WCDMA specification summary
| 3G UMTS Specification Summary | |
|---|---|
| Parameter | Specification |
| Maximum data rate | 2048 kbps low range 384 kbps urban and outdoor |
| RF channel bandwidth | 5 MHz |
| Multiple access scheme | CDMA |
What is spreading factor in UMTS?
The Spreading Factor is the ratio of the chips (UMTS = 3.84Mchips/s) to baseband information rate. Spreading factors vary from 4 to 512 in FDD UMTS. Spreading process gain can in expressed in dBs (Spreading factor 128 = 21dB gain).
Which technique is used in WCDMA?
Analysis of these techniques is crucial to improve the performance of a system. We have considered two modulation techniques of Quadrature Amplitude Modulation (QAM) and Quadrature Phase Shift Keying (QPSK) used in WCDMA systems.
What is Cpich Rscp?
CPICH RSCP. Definition Received Signal Code Power, the received power on one code measured on the pilot bits of the Primary CPICH. The reference point for the RSCP is the antenna connector at the UE. Applicable for. Idle, Connected Intra, Connected Inter.
What is Pilot Power Telecom?
The pilot power of a cell effectively determines the cell size, and, consequently, the traffic load in the cell. Thus, to optimize the network performance, the pilot power levels should be carefully chosen [12].
Is UMTS and WCDMA same?
Following are the key differences between UMTS vs WCDMA: Though both are developed for mobile communications in the 3G network, UMTS is developed for 3G networks alone, whereas WCDMA is developed for 3G networks and 3G+ networks. When we consider WCDMA, it is based on GSM to make the coverage for 2G and 3G.
What is difference between TDD and FDD?
FDD stands for Frequency Division Duplex, and TDD stands for Time Division Duplex. TDD systems use a single frequency band for both transmit and receive. A system shares the same band and assigns alternative time slots for transmit and receive operations.
How do you calculate spreading factor?
Spreading Factor (SF) decides on how many chirps, the carrier of the data, are sent per second. The network decides the spreading factor (graded between 7-12) based on the environmental conditions between the communication device and the gateway.
How long is WCDMA frame?
WCDMA uses a frame size of 10 ms with 16 time-slots per frame. Orthogonal Walsh functions are used to separate channels within one transmitted signal and long pseudorandom codes are used to separate signals from different sources.
Which is faster WCDMA or LTE?
When the data rates are compared, LTE provides massive downlink and uplink speeds than WCDMA. In general, WCDMA is considered as 3G technology while LTE is considered as 4G technology. LTE provides higher data rates than WCDMA by achieving higher spectral efficiency.
Which is better GSM or WCDMA?
GSM represents 2G networks that were developed way before WCDMA and helps to transfer data through radio technology in the system. The efficiency and speed are better in WCDMA due to the technology used in the network and the coding channel separating the data columns in the system.
What does CPICH stand for in WCDMA FDD?
The use of CPICH (Common Pilot Channel) CPICH stands for Common Pilot CHannel in UMTS and some other CDMA communications systems. In WCDMA FDD cellular systems, CPICH is a downlink channel broadcast by Node Bs with constant power and of a known bit sequence.
What is the power of the CPICH channel?
A common the CPICH power is 10% of the typical total transmit power of 43 dBm. The Primary Common Pilot Channel is used by the UEs to first complete identification of the Primary Scrambling Code used for scrambling Primary Common Control Physical Channel (P-CCPCH) transmissions from the Node B.
How is CPICH used in the UES network?
The Primary Common Pilot Channel is used by the UEs to first complete identification of the Primary Scrambling Code used for scrambling Primary Common Control Physical Channel (P-CCPCH) transmissions from the Node B. Later CPICH channels provide allow phase and power estimations to be made, as well as aiding discovery of other radio paths.
What is the spreading code for a CPICH?
There is one primary CPICH (P-CPICH), which is transmitted using spreading code 0 with a spreading factor of 256, notationally written as Cch,256,0 [1]. Optionally a Node B may broadcast one or more secondary common pilot channels (S-CPICH), which use arbitrarily chosen 256 codes, written as Cch,256,n where 0 < n < 256.