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21 August 2008
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Cover Story
Antenna Diversity Strengthens Wireless LANs
By Jaekyun Moon And Younggyun Kim
Defined as a technique that takes multiple observations of a signal coming off a transmit station in order to recover that signal with greater accuracy, antenna diversity has long been promoted as a means of improving overall signal reception. However, its processing requirements have limited its penetration. Yet, not all forms of diversity are the same. Some, versions, such as dynamic diversity, are optimized for low power consumption and high performance. However, this technique requires close attention to link-quality on the receive side for an effective implementation.
Online Exclusive
Build High Availability into Your IP Network: Part 2
By Purnam A. Sheth
This, the second of a two-part series, will examine the software design factors that are critical to achieving the much-touted "five-nines" availability of IP networks.
Features
Build High Availability into Your IP Network: Part 1
By Purnam A. Sheth
Overcoming the inherent vulnerabilities of network edge routers is the most important step on the road to reliable IP networks.
Optimize the RISC/DSP Combo for Voice over IP
By Dariush Baghbadrani
Extensible architectures are a way to combine RISC and DSPs, but a poor implementation can negatively affect cost and execution speed.
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