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To: 49thMIMOMander who wrote (13892)	7/17/2001 2:46:07 PM
From: S100	Read Replies (1) \| Respond to of 34857

In any case, WCDMA chip rate and internals were changed world wide, not just in USA. I would think this means that the USA was more picky about this than the rest of the world and drove the WCDMA spec. Not bragging, quite the opposite. I was just wondering how WCDMA designers could have made such a big mess. Not creating a "strawman" now, are you ;-) Little more info snip Through indoor and outside test, we can draw some conclusion as follows: Ÿ Interference free windows of LAS-CDMA system assuredly exist, and LS code can work normally; Ÿ Within interference free windows, MAI can be effectively resisted. However, outside interference free windows, it is impossible to guarantee the system performance. Ÿ From the viewpoint of single base station, when IFW is (-3, +3), the system capacity is greater than IS-95 on the condition that interference signals are added simulatively; Ÿ In the environment with multi-path propagation, whether one code channel is working or multiple code channel are working together, the system can effectively resist ISI; Ÿ This system can work in moving environment; Ÿ LA code can work normally. [reference] 4. The test scheme for LAS-CDMA technology 5. The technology scheme of LAS-CDMA prototype device's principle 6. Primary test data, which LAS-CDMA test group has tested. Conclusion LAS-CDMA technology validation meeting organized by MII was held in Shi Jia Zhuang City (Hebei Province) on September 15, 2000. The LAS-CDMA technology and concept prototype was verified and validated. To begin, the test group, nominated by Science and Technology Department of Ministry of Information Industry (MII), presented of test report for LAS-CDMA concept Prototype I to the validation group. The LinkAir Company Limited also gave an introduction on the LAS-CDMA technology and the technical scheme for the LAS-CDMA Prototype I. After visiting the prototype on-site and after careful discussion, the attendees agreed to the following conclusions: 1. The LAS-CDMA technology can create an Interference Free Window (IFW) by using LS codes, which also decrease the adjacent cell interference by using LA codes and transforming the LS codes. Therefore, LAS-CDMA is proven theoretically correct. 2. By the testing the concept prototype, the existence of an Interference Free Window is verified. When the prototype operates in high SNR conditions, the Multi-Access Interference demonstrates no influence to the system; when it works in low SNR conditions, and the MAI is stronger than the traffic channel, the transmission performance has little degradation (within 10E-1). It is also verified that the concept prototype has the strong capabilities for suppressing ACI, and works well in a vehicular environment (up to 45 Km/h). 3. Through theoretical analysis and the prototype test, it is verified that: (a) The LAS-CDMA technology can enhance spectrum efficiency, and hence provide higher system capacities, (b) the system can support voice (low data rate) and data (high speed data) by using different code channels with different power values within the same cell. snip Guess if you stand right here, left foot in air, right hand just so, facing NNE, may get good reception? If do not move and wind not blowing? Kind of like getting all in lather about TD-SCDMA.