ABSTRACT
Contents 11.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 358 11.2 MIMO HSDPA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 358
11.2.1 System Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 358 11.2.2 Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 360 11.2.3 Quantized Precoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 361 11.2.4 Feedback Calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 362
11.3 Measurement Setup and Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 363 11.3.1 Measurement Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 363 11.3.2 Measurement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 366 11.3.3 Inferring the Average Performance. . . . . . . . . . . . . . . . . . . . . . . 368
11.4 Achievable Mutual Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369 11.5 Measurement Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370
11.5.1 Alpine Scenario . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 371 11.5.2 Urban Scenario . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 373 11.5.3 Discussion of the Throughput Loss . . . . . . . . . . . . . . . . . . . . . . 373
11.6 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 374 11.7 Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375
11.1 Introduction In this chapter, physical layer throughput measurement results of multipleinput, multiple-output (MIMO) High-Speed Downlink Packet Access (HSDPA) [1] are presented. The results were obtained in two extensive measurement campaigns: The first campaign was carried out in an alpine valley in Austria. Here, the propagation channel had a very small mean root mean square (RMS) delay spread1 of about one chip (260 ns) due to the fact that scattering objects existed only in the immediate vicinity of the receiver. The second campaign was carried out in the inner city of Vienna, Austria. Here, the propagation conditions were non-line-of-sight with a rather large mean RMS delay spread of about 3.8 chips (1 µs).
