Optimizing and Testing WLANs phần 3 ppsx

... rather than twisted pair. 3. 3 Outdoor and Indoor OTA OTA environments are divided into two types: outdoor and indoor. Each type has its own issues that must be considered. 3. 3.1 The Outdoor Environment The ... Control SW Figure 3. 5: Typical Channel Sounder Channel sounders will be described in more detail in Chapter 9. 3. 4 Chambered OTA Testing 3. 4.1 Types of Chambers Chamber...

Ngày tải lên: 14/08/2014, 14:20

... Protocol Testing 109 5.1 An Introduction to Protocol Testing 109 5.2 Conformance and Functional Testing 111 5 .3 Interoperability Testing 117 5.4 Performance Testing 121 5.5 Standardized Benchmark Testing ... Testing 133 Chapter 6: Application-Level Measurements 137 6.1 System-level Measurements 137 6.2 Application Traffi c Mixes 146 6 .3 VoIP Testing 150 6.4 Video and...

Ngày tải lên: 14/08/2014, 14:20

... Lifecycle Chip Design And Verif- ication Chip Fabri- cation Chip Valid- ation Testing Chip Manuf- acturing Testing Device Prequal- ification Testing System Design Integ- ration Testing QA Testing Environ- mental And Regula- tory Testing Equip- ment Produc- tion Eval- uation Testing Equip- ment Install- ation Mainte- nance Site Survey Test Post- Install Testing Testing ......

Ngày tải lên: 14/08/2014, 14:20

... generation of WLAN traffi c. Ch 03- H7986.indd 73Ch 03- H7986.indd 73 6/28/07 9:55: 53 AM6/28/07 9:55: 53 AM Chapter 4 76 name but a few. Many books have been written on RF and digital signal measurements ... test software Attenuator Attenuator Ch04-H7986.indd 83Ch04-H7986.indd 83 6/28/07 10:00:55 AM6/28/07 10:00:55 AM Chapter 3 70 If the DUT’s antennas are connectorized and thus rem...

Ngày tải lên: 14/08/2014, 14:20

... IEEE 802.11 generate very wideband signals between 16 and 20 MHz in terms of 3 dB bandwidth. To ensure that they minimize or limit cross-channel and out-of-band interference, IEEE 802.11 transmitters ... AM Protocol Testing 111 range of the DUT receiver to strike the best compromise between signal-to-noise ratio (SNR) and intermodulation distortion (IP2 and IP3), and hence min...

Ngày tải lên: 14/08/2014, 14:20

... forwarding rate and packet loss, • latency, • scalability in terms of number of clients and APs, Ch05-H7986.indd 134 Ch05-H7986.indd 134 6/28/07 10:16:28 AM6/28/07 10:16:28 AM Chapter 5 130 and APs, ... complexity of the product and the level of quality required. 5 .3 Interoperability Testing Interoperability testing is diametrically opposed to both functional and performance...

Ngày tải lên: 14/08/2014, 14:20

... AP * 1 23 456 789 * 0# * 1 23 456 789 * 0# * 1 23 456 789 * 0# * 1 23 456 789 * 0# * 1 23 456 789 * 0# * 1 23 456 789 * 0# * 1 23 456 789 * 0# * 1 23 456 789 * 0# * 1 23 456 789 * 0# * 1 23 456 789 * 0# * 1 23 456 789 * 0# * 1 23 456 789 * 0# Ch06-H7986.indd ... Handsets * 1 23 456 789 * 0# * 1 23 456 789 * 0# * 1 23 456 789 * 0# * 1 23 456 789 * 0# * 1 23 456 789 * 0# * 1 23...

Ngày tải lên: 14/08/2014, 14:20

... transmitter and determine the various gain and I/Q balance constants Align the receiver and determine the RSSI and AGC constants Determine LNA and diversity switching constants Calculate and program ... the chipset and therefore the system is non-functional. 7.5 Functional and System Testing Functional and system tests are performed after the WLAN device has been fully a...

Ngày tải lên: 14/08/2014, 14:20

... special needs and approaches for testing MIMO devices and systems. Note that as much of this technology is just being developed, and the whole area of MIMO in wireless LANs (WLANs) is still ... over- view to understand how MIMO works and its effects on both WLAN equipment and test procedures. CHAPTER 9 Ch09-H7986.indd 207Ch09-H7986.indd 207 6/28/07 11:24: 03 AM6/28/07 11:24: 0...

Ngày tải lên: 14/08/2014, 14:20

... 211–2 13 Channel capacity 2 13 214 Channel emulator 232 , 233 – 237 Coding 217–218 vs. Diversity 214–215 DUT complexity 231 DUT coupling 232 – 233 IEEE 802.11n 219–224 Multipath 208 Performance 232 Scattering ... interoperation 230 – 231 Operating mode 220–221 PHY layer support 230 QoS extension 228– 230 Receiver datapath 2 23 224 Test equipment 237 – 238 Test setup and environ...

Ngày tải lên: 14/08/2014, 14:20