Tài liệu Adaptive WCDMA (P16) pdf

... coherent detection when adaptive antennas are not employed. The pilot channel is similar to IS-95 (i.e. it is composed of a long PN code and Walsh sequence number 0). When adaptive antennas are ... closed loop power control uses variable step sizes of 0.5, 1, 2 and 4 dB, which are adaptively controlled. IS-665 WCDMA supports the use of interference cancellation. So, even this standard w...

Ngày tải lên: 21/01/2014, 07:20

... shift register, which has a feedback tap connected to the ith cell if h i = 1, 0 <i≤ n. Adaptive WCDMA: Theory And Practice. Savo G. Glisic Copyright ¶ 2003 John Wiley & Sons, Ltd. ISBN:

Ngày tải lên: 24/12/2013, 01:17

... maximize the likelihood function defined as λ( ˜ θ) =  r(t)s(t, ˜ θ)dt −  s 2 (t, ˜ θ)dt(3.4) Adaptive WCDMA: Theory And Practice. Savo G. Glisic Copyright ¶ 2003 John Wiley & Sons, Ltd. ISBN: ... case. Similar improvements can be achieved by using adaptive integration time or thresh- old setting keeping CFAR. The mean acquisition time for the adaptive integration time approach is...

Ngày tải lên: 24/12/2013, 01:17

... an equivalent noise. In this case, equation (7.3) can be interpreted as the estimation error. Adaptive WCDMA: Theory And Practice. Savo G. Glisic Copyright ¶ 2003 John Wiley & Sons, Ltd. ISBN: ... response of the adaptive process to the random variations of W 0i caused by a nonstationary input signal. In what follows, we will show that increasing the time constant of the adaptive p...

Ngày tải lên: 24/12/2013, 01:18

... these adaptive modulation methods. 6 FUNDAMENTALS Adaptive coding scheme Efficient error control on time-varying channels can be performed, independent of modulation, by implementing an adaptive ... check, which introduces additional redundancy. Adaptive coding, modulation and power control While adaptive modulation (with coded or uncoded signal) and adaptive coding described earli...

Ngày tải lên: 14/12/2013, 14:15

... +  2  T c  (4.4) The tracking error variance can be expressed as [1] τ 2 δ 1 2ρ L  1 + 2 ρ if  (4.5) Adaptive WCDMA: Theory And Practice. Savo G. Glisic Copyright ¶ 2003 John Wiley & Sons, Ltd. ISBN: ... Receiver block diagram: (a) generic block diagram of Rake receiver and (b) The decision feedback adaptive linear predictor (ALP) algorithm for tracking a complex multipath coeffi...

Ngày tải lên: 24/12/2013, 01:17

... channel as p(n, ˜τ)=  ∞ −∞ r(t)h(t − nT −˜τ)dt q(n, ˜τ,ε)=  ∞ −∞ r(t)h(t − nT − εT −˜τ)dt (5.6) Adaptive WCDMA: Theory And Practice. Savo G. Glisic Copyright ¶ 2003 John Wiley & Sons, Ltd. ISBN: ... Commun., COM-30, 2228–2241. 146 MODULATION AND DEMODULATION 11. Kobayashi, H. (1971) Simultaneous adaptive estimation and decision algorithm for carrier modulated data transmission syst...

Ngày tải lên: 24/12/2013, 01:18

... S. (1994) Adaptive trellis-coded multiple-phase-shift keying for Rayleigh fading channels. IEEE Trans. Commun., 42(6), 2305–2314. 73. Kousa, M. A. and Turner, L. F. (1993) Multichannel adaptive ... rate adaptive channel coding for Rayleigh fading channels. IEEE Trans. Commun., 47(9), 1345–1356. 92. Alouini, M S. and Goldsmith, A. (1999) Capacity of Rayleigh fading channels under differe...

Ngày tải lên: 24/12/2013, 01:18

... G −1 (E b /N 0 ) R  n−1  i=1 α i  =  (E b /N 0 ) −1 R + G −1  n−1  i=1 α i  −1 (8.3) Adaptive WCDMA: Theory And Practice. Savo G. Glisic Copyright ¶ 2003 John Wiley & Sons, Ltd. ISBN: ... from Yoshida, S. and Ushirokawa, A. Capacity evaluation of CDMA-AIC: CDMA cellular system with adaptive interference cancellation. 1995 Fourth IEEE International Conference on Universal Pers...

Ngày tải lên: 24/12/2013, 01:18

... based on the specified E b /I 0 C I =  E b I 0  ·  R b B  · η ⇔ E b I 0 = G · C Iη (9.1) Adaptive WCDMA: Theory And Practice. Savo G. Glisic Copyright ¶ 2003 John Wiley & Sons, Ltd. ISBN: ... Reproduced from Holma, H. and Toskala, A. (2000) WCDMA for UMTS. New York: John Wiley & Sons, by permission of IEEE. SPECTRAL EFFICIENCY OF WCDMA 289 capacity improvement is smaller tha...

Ngày tải lên: 24/12/2013, 01:18