Optimizing and Testing WLANs phần 1 pot

... AmendmentsMAC Amendments IEEE 802 .11 802 .11 MAC 802 .11 PHY 802 .11 b (2.4GHz CCK, 19 99) 802 .11 a (5GHz OFDM, 19 99) 802 .11 g (2.4GHz OFDM, 2003) 802 .11 h (Spectrum management) 802 .11 j (4.9GHz Japan, 2004) Task ... Functional Testing 11 1 5.3 Interoperability Testing 11 7 5.4 Performance Testing 12 1 5.5 Standardized Benchmark Testing 13 3 Chapter 6: Application-Level M...

Ngày tải lên: 14/08/2014, 14:20

... for calibration, and a DC power supply to power the DUT. Ch07-H7986.indd 17 1Ch07-H7986.indd 17 1 6/28/07 10 :19 :16 AM6/28/07 10 :19 :16 AM Chapter 8 19 2 The above is a minimal setup, and the site survey ... EEPROM Ch07-H7986.indd 17 6Ch07-H7986.indd 17 6 6/28/07 10 :19 :18 AM6/28/07 10 :19 :18 AM 18 1 Installation Test A considerable amount of testing is performed during th...

Ngày tải lên: 14/08/2014, 14:20

... Switch Antenna Antenna Ch 01- H7986.indd 17 Ch 01- H7986.indd 17 6/28/07 12 :49:05 PM6/28/07 12 :49:05 PM Chapter 1 20 exacting requirements. The 802 .11 a and 802 .11 g standards, however, raised this to 54 Mb/s in the same bandwidth. ... 800mW 10 0 mW 10 0mW 200mW 10 00 mW 50mW 250mW 200mW GHz Figure 1. 13: 802 .11 Frequency Bands and Emission Limits Ch 01- H7986.indd 20Ch 01...

Ngày tải lên: 14/08/2014, 14:20

... Host Computer with Test Software Ch02-H7986.indd 41Ch02-H7986.indd 41 6/28/07 12 :49:50 PM6/28/07 12 :49:50 PM Metrology, Test Instruments, and Processes 51 produce a coherent signal such as a strong, ... to 15 00 V, and Ch02-H7986.indd 52Ch02-H7986.indd 52 6/28/07 12 :49:55 PM6/28/07 12 :49:55 PM WLAN Test Environments 63 Dealing with the spatial and temporal variations fou...

Ngày tải lên: 14/08/2014, 14:20

... BPSK 2 Ϫ8 39.8 12 QPSK 4 10 31. 6 18 QPSK 4 13 22.3 24 16 -QAM 16 16 15 .8 36 16 -QAM 16 19 11 .2 48 64-QAM 64 Ϫ22 7.9 54 64-QAM 64 Ϫ25 5.6 In practice, measuring EVM on 802 .11 devices is almost ... at least 16 symbols in size, and containing random data. The IEEE 802 .11 standard actually defi nes a procedure for measuring EVM for 802 .11 a and 802 .11 g transmitters (see su...

Ngày tải lên: 14/08/2014, 14:20

... conformance testing, where it is frequently necessary to generate abnormal or illegal Ch05-H7986.indd 11 1Ch05-H7986.indd 11 1 6/28/07 10 :16 :20 AM6/28/07 10 :16 :20 AM Chapter 5 11 4 get such a ... specifi ed time after the signal begins (Ͻ4 μs for 802 .11 a and 802 .11 g in short-slot mode, Ͻ25 μs for standard 802 .11 b, and 15 μs for standard 802 .11 g). This is referred to a...

Ngày tải lên: 14/08/2014, 14:20

... covered. Ch06-H7986.indd 14 1Ch06-H7986.indd 14 1 6/28/07 1: 14:45 PM6/28/07 1: 14:45 PM Protocol Testing 11 7 Secondly, there are four distinct encryption modes (none, WEP, TKIP, and AES-CCMP). Again, ... Ch05-H7986.indd 12 1Ch05-H7986.indd 12 1 6/28/07 10 :16 :23 AM6/28/07 10 :16 :23 AM Protocol Testing 11 9 One of the most crucial requirements of a successful performance...

Ngày tải lên: 14/08/2014, 14:20

... Traffic Sink Link-segment Testing Ch06-H7986.indd 14 6Ch06-H7986.indd 14 6 6/28/07 1: 14:46 PM6/28/07 1: 14:46 PM Chapter 6 14 8 802 .11 MAC frame) would require only 16 6 ␮s to transmit at an 11 Mb/s PHY bit ... video stream. Ch06-H7986.indd 16 1Ch06-H7986.indd 16 1 6/28/07 1: 14: 51 PM6/28/07 1: 14: 51 PM Chapter 6 15 6 sensitive RF plumbing. Finally, the need to capture a...

Ngày tải lên: 14/08/2014, 14:20

... 204Ch08-H7986.indd 204 6/28/07 10 :20 :10 AM6/28/07 10 :20 :10 AM Chapter 8 19 8 For relatively low data rate PHY layers such as 802 .11 a, 802 .11 b, and 802 .11 g, the distinction between Ricean and Rayleigh channels ... useful for the testing and performance measurement of actual 802 .11 n devices and systems. 9.2.3 IEEE 802 .11 n Operational Modes: Antennas, Bandwidth, and...

Ngày tải lên: 14/08/2014, 14:20

... 10 1 Performance 30 Performance test 30, 44, 55, 73, 76, 11 0, 11 8, 12 1 13 3, 15 2, 232 Goal 12 3 12 4 Metrics 12 4 12 7, 13 0 13 2 Open-air test setup 12 1 12 3 Receiver 76 Roaming 12 8 13 0 System 99 10 4 Transmitter ... to DUT 70 Excluding interference 71 72 Heat dissipation 72 Power level 71 Conformance test 30, 11 1, 11 4 11 6 MAC layer 11 5 PHY layer 11 4 11 5 Proced...

Ngày tải lên: 14/08/2014, 14:20