214 REFERENCES [Wan06a] T. Wang, J. G. Proakis, E. Masry and J. R. Zeidler, "Performance degradation of OFDM systems due to Doppler spreading," IEEE Trans. Wireless Commun., vol. 5, no. 6, pp. 1422-1432, June 2006. [WanOO] X. F. Wang, S.-S. Lu, and A. Antoniou, "Constrained minimum-BER multiuser detection," IEEE Trans. Sig. Proc, vol. 48, pp. 2903-2910, Oct. 2000. [Wan99] X. Wang and H. V. Poor, "Iterative (Turbo) soft interference cancellation and decoding for coded CDMA," IEEE Trans. Commun., vol. 47, pp. 1046-1061, July 1999. [Wan06b] Y.-P. E. Wang, "DS-CDMA downlink system capacity enhancement through interference suppression," IEEE Trans. Wireless Commun., vol. 5, no. 7, pp. 1767-1774, July 2006. [Wei71] [Wei96] [Wel03] S. B. Weinstein and P. M. Ebert, "Data transmission by frequency-division multiplexing using the discrete Fourier transform," IEEE Trans. Commun. Technol., vol. COM-19, pp. 628-634, Oct. 1971. L. Wei and L. K. Rasmussen, "A near ideal noise whitening filter for an asynchronous time-varying CDMA system," IEEE Trans. Commun., vol. 44, pp. 1355-1361, Oct. 1996. L. Welburn, J. K. Cavers, and K. W. Sowerby, "Accurate error-rate calculations through the inversion of mixed characteristic functions," IEEE Trans. Commun., vol. 51, pp. 719-721, May 2003. [Wha71] A. D. Whalen, Detection of Signals in Noise. New York: Academic Press, 1971. [Wij92] [Wij96] [Wil92] [Win84] [Won98] S. S. H. Wijayasuriya, G. H. Norton and J. P. McGeehan, "Sliding window decorrelating algorithm for DS-CDMA receivers," IEE Electron. Lett., vol. 28, no. 17, 1992. S. S. H. Wijayasuriya, G. H. Norton and J. P. McGeehan, "A sliding window decorrelating receiver for multiuser DS-CDMA mobile radio networks," IEEE Trans. Veh. Technoi, vol. 45, no. 3, pp. 503-521, Aug. 1996. D. Williamson, R. A. Kennedy, and G. W. Pulford, "Block decision feedback equalization," IEEE Trans. Commun., vol. 40, pp. 255-264, Feb. 1992. J. H. Winters, "Optimum combining in digital mobile radio with cochannel interference," IEEE J. Sel. Areas Commun., vol. SAC-2, pp. 528-539, July 1984. T. F. Wong, T. M. Lok, J. S. Lehnert, and M. D. Zoltowski, "A linear receiver for direct-sequence spread-spectrum multiple-access systems with antenna arrays and blind adaptation," IEEE Trans. Inform. Theory, vol. 44, pp. 659-676, Mar. 1998. T. F. Wong, T. M. Lok, and J. S. Lehnert, "Asynchronous multiple-access interference suppression and chip waveform selection with aperiodic random sequences," IEEE Trans. Commun., vol. 47, pp. 103-114, Jan. 1999. P. B. Wong and D. C. Cox, "Low-complexity diversity combining algorithms and circuit architectures for co-channel interference cancellation and frequencyselective fading mitigation," IEEE Trans. Commun., vol. 44, pp. 1107-1116, Sept. 1996. G. Woodward, R. Ratasuk, M. L. Honig and P. B. Rapajic, "Minimum meansquared error multiuser decision-feedback detectors for DS-CDMA," IEEE Trans. Commun., vol. 50, no. 12, pp. 2104-2112, Dec. 2002. Z. Xie, R. T. Short, and C. K. Rushforth, "A family of suboptimum detectors for coherent multiuser communications," IEEE J. on Sel. Areas Commun., vol. 8, pp. 683-690, May 1990.
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Channel Equalization for Wireless C
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To my colleagues at Ericsson
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CONTENTS List of Figures List of Ta
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CONTENTS XI 4.2 4.3 4.4 4.5 4.6 4.1
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CONTENTS XIII 8 Practical Considera
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xvi LIST OF FIGURES 2.2 Matched fil
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XviÜ LIST OF FIGURES 6.18 Scatter
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XX Prologue Alice was nervous. Woul
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XXÜ PREFACE is introduced as neede
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ACRONYMS AC A/D ADC AMLD AMPS ASK A
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ML MLD MLPD MLSD MLSE MRC MSE MSB O
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2 INTRODUCTION Table 1.1 Possible m
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4 INTRODUCTION s o S 1 8 2 S 3 S 0
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6 INTRODUCTION A block diagram of t
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8 INTRODUCTION Figure 1.7 QPSK. tra
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10 INTRODUCTION phases (phase modul
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12 INTRODUCTION rollo« 0.22 0.8 Ί
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14 INTRODUCTION is the "channel" re
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16 INTRODUCTION 1.4 MORE MATH In th
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18 INTRODUCTION For K = 1 (order 0)
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20 INTRODUCTION The K = 4 main bloc
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22 INTRODUCTION A sample of the noi
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24 INTRODUCTION The receiver may ha
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26 INTRODUCTION 1.5.1 Reference sys
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28 INTRODUCTION a) What most likely
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CHAPTER 2 MATCHED FILTERING In this
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MORE DETAILS 33 2.2 MORE DETAILS So
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THE MATH 35 Now compare the output
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THE MATH 37 The correlation in (2.2
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THE MATH 39 correlation function f(
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THE MATH 41 Thus, in the complex pl
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THE MATH 43 to the medium response
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THE MATH 45 We can interpret f(t) a
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MORE MATH 47 10" 1 Odeg 90 deg X 18
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MORE MATH 49 With despread-level Ra
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MORE MATH 51 Figure 2.6 OFDM exampl
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MORE MATH 53 2.4.3 MF in colored no
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PROBLEMS 55 period) is examined in
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CHAPTER 3 ZERO-FORCING DECISION FEE
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MORE DETAILS 59 1/c r m —► H i
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MORE DETAILS 61 where «i = m - (d/
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MORE MATH 63 Because there is no IS
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MORE MATH 65 In the later chapter o
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PROBLEMS 67 b) What is the detected
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CHAPTER 4 LINEAR EQUALIZATION With
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THE IDEA 71 estimate of symbol s 2
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THE IDEA 73 Notice that £2 (MSE) d
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MORE DETAILS 75 The first term is t
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MORE DETAILS 77 To obtain the unity
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THE MATH 79 and SINR becomes w T h
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THE MATH 81 To obtain the MMSE solu
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THE MATH 83 where *m n = ν ^ ^ ^ '
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THE MATH 85 power is much larger th
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MORE MATH 87 IQ' 1 OC 111 ω 10 2 1
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MORE MATH 89 values of h k m (f) fr
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MORE MATH 91 where C(d(),d 0 ) . C(
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AN EXAMPLE 93 between z and s. This
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PROBLEMS 95 Another aspect of cocha
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PROBLEMS 97 The math 4.11 Consider
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100 MMSE AND ML DECISION FEEDBACK E
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102 MMSE AND ML DECISION FEEDBACK E
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104 MMSE AND ML DECISION FEEDBACK E
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106 MMSE AND ML DECISION FEEDBACK E
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108 MMSE AND ML DECISION FEEDBACK E
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110 MMSE AND ML DECISION FEEDBACK E
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112 MMSE AND ML DECISION FEEDBACK E
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CHAPTER 6 MAXIMUM LIKELIHOOD SEQUEN
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MORE DETAILS 117 r 2 Ht, r, fcl + f
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MORE DETAILS 119 Figure 6.3 MLSD tr
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THE MATH 121 legs of the journey is
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THE MATH 123 Figure 6.8 MLSD trelli
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THE MATH 125 We would then identify
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THE MATH 127 Expanding the square,
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THE MATH 129 Consider the matched f
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THE MATH 131 6.3.5.1 M-algorithm Wi
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THE MATH 133 results, DFE and MLSD
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THE MATH 135 IQ" 1 oc LU CD 10 2 10
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THE MATH 137 sometimes inaccurate w
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MORE MATH 139 POWER CONTROL effecti
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MORE MATH 141 15 POWER CONTROL 10
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MORE MATH 143 6.4.3 More approximat
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THE LITERATURE 145 EDGE is an evolu
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PROBLEMS 147 the channel to minimum
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PROBLEMS 149 c) Suppose we know «o
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152 ADVANCED TOPICS detecting the w
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154 ADVANCED TOPICS Table 7.2 Examp
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156 ADVANCED TOPICS Let's look at t
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158 ADVANCED TOPICS Thus, for MAPSD
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160 ADVANCED TOPICS Table 7.6 Examp
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162 ADVANCED TOPICS If we assume no
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- Page 220 and 221: 198 REFERENCES [Ari98] [Ari99] [Ari
- Page 222 and 223: 200 REFERENCES [Bra91] W. R. Braun
- Page 224 and 225: 202 REFERENCES [Div98] [Dou95] [Due
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