Download Advances in 3G Enhanced Technologies for Wireless by Jiangzhou Wang, Tung-Sang Ng PDF

By Jiangzhou Wang, Tung-Sang Ng

Will give you in-depth wisdom of many of the technical regimes for imposing 3rd new release (3G) instant cellular communications platforms, and covers the past due improved innovations more likely to develop into destiny criteria in 3.5G or 3GPP2. vital reference for training execs and scholars.

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Extra resources for Advances in 3G Enhanced Technologies for Wireless Communications

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However, in addition to the problem described in [32], the TPC delay increases. 22 [29]. (k ) 1. First loop: The standard transmit powers, P REF , of all BSk are compensated by ⌬P (k ) (in decibels) according to the dedicated control channel from a MS based on the average SIR measurement at an MS. 22) where the Measured_total_E b /I 0 and Target_E b /I 0 are the measured E b /I 0 after RAKE combining and the target E b /I 0 at an MS, (k ) respectively. The P REF is constant during the length of the G slot (k ) and its value of n (= g × G )th slot P REF (n ) is updated every G (k ) (k ) slot as P REF (g × G ) = P REF (( g − 1) × G ) + ⌬P (k ).

Therefore, by detecting a signature s in a preamble part, BTS can simplify code synchronization processing in a message part. That is, for the channelization code of a control part, one orthogonal variable spreading factor code with a 256chip length for every 16 code, C ch ,256,m is selected in accordance with the 16 signatures s based on the relation of m = 16(s − 1) + 15. However, orthogonal variable spreading factor code C ch ,SF,m is obtained according to the spreading factor from 32 to 256 and s using the corresponding relation m = SF × (s − 1)/16 for the channelization code of a data part.

The optimum value of ␣ i varies according to the fading correlation between succeeding slots in a real fading channel. Therefore, we proposed [21] an adaptive WMSA channel estimation filter, in which a weighting factor is adaptively controlled by measuring an inner product of the averaged despread pilot signals of successive slots. The SIR measurement interval M is a design parameter and is closely related to the TPC delay. In general, as M increases, the SIR measurement becomes more accurate. However, a TPC delay of more than one slot is required.

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