By Adam Rosenberg
Now that CDMA has been permitted as a key section of around the world 3G platforms, provider services, skill planners, engineers and technicians have to comprehend the easiest tools and instruments for maximizing throughput, capability, and caliber. This e-book offers that services.
Read or Download CDMA Capacity and Quality Optimization (Telecom Engineering) PDF
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Extra resources for CDMA Capacity and Quality Optimization (Telecom Engineering)
Analog cellular FM signals have a 1-dB capture ratio and sound fine with a 3-dB S/N ratio so long as nobody is moving. However, since cellular is specifically a mobile telephone technology, it behooves us to have a performance specification robust enough to ensure high signal quality for a moving radio source, as discussed in Sec. 4. It takes another 20 dB of S/I protection, more or less, to overcome the handicap of motion. 9999 percent, we describe digital link performance in terms of a 1026 bit error rate (BER).
There are three reasons wireless data may have a broader subscriber base. First of all, cellular service providers and third-party providers relying on cellular networks are building turnkey prepackaged services and wooing small and medium-sized businesses. Second, it will benefit commercial vendors and service providers if their customers enter the high-speed wireless world as consumers, not just as employees. Third, the largest firms have the option of developing their own wireless infrastructure on a private band.
4 we will discuss directional antennas, including phased arrays and smart adaptive antennas, more extensively. The mobile telephone antenna, however, is presently designed as an omnidirectional antenna, not just 360 degrees but a full 4p sphere with no antenna gain (0 dB gain). This is essential because a subscriber may rotate or tilt the mobile telephone and its antenna in any direction. If the mobile telephone could have significant antenna gain, then the more efficient radio link would improve coverage in poor reception areas and allow the battery to function longer without recharging.