RTT Technology Topics - 1999
We help companies and organisations maximise returns from existing technology and engineering investment.
| 1999 | Title | Synopsis |
|---|---|---|
| December | 3G DSP | To increase the commonality of design approach between handset and base station, similar architectures and indeed identical hardware may be used by adopting the technique of running a particular DSP at 3 or 5 volts when used in the base station and using the same device in the handset powered at 1v. |
| November | WCDMA Processing gain | A fundamental principle of the spread spectrum process is that prior to the baseband processing an improvement in CNR can be obtained. |
| October | 3G Demodulation budget | This article continues the theme of September's Hot Topic in which we considered the influence of the receiver bandwidth on the noise generated in the receiver front end. The bandwidth was derived from considering the modulation characteristics. |
| September | 3G receiver noise budget | The first of a series of technology topics examining the factors influencing the link budget performance (both through the propagation medium and the hardware) of a 3G mobile air interface utilizing Wideband CDMA technology. |
| August | 3G TV | The delivery of content is presently being promoted as a value opportunity by the cellular operator community. However, as information bandwidth increases, information value decreases. As information value decreases, the value of delivery bandwidth goes down (the decline of spectral value).This technology topic analyses how and why 3G TV will contribute to this value transition and identifies associated value ownership issues . |
| July | 3G Network density | The challenge for third generation cellular is how to deliver a physical layer which can transparently service an application layer optimized for wireline access. In an ideal world, the user should experience little or no difference between a wireline and wireless accessed application. A winning market proposition cannot be built on an apology. |
| June | Digital IF design | In response to the pressures for multi-band, multi-mode cellular handset operation, digitally sampled receiver IF implementations are becoming the norm. The high performance obtainable through these techniques will also provide the solution to 3G (WCDMA/cdma2000) requirements. |
| May | Ad hoc networks | IP address and routing protocols provide an elegant and flexible mechanism for managing mobile networks including ad hoc self-configurable networks. |
| April | Mobile IP | Mobile IPV6 is being developed to address the issue of IP address mobility. People can have IP addresses (issued at birth) and devices can have IP addresses (issued on the production line). IPV6 could also be used to address the issue of micro-mobility management -for example the management of devices and/or people supported within a self contained Intranet with or without extended links to the outside world |
| March | CDMA and GSM | W-CDMA is presented as a logical choice for existing GSM network operators partly because of the compatibility between the multi-frame and super-frame structure, partly because of the integration of the GSM beacon channel and W-CDMA pilot symbols, partly because of the clock rate and chip rate multiples and partly because of the evolution route from existing GSM MAP network architectures (and associated legacy network investment). |
| February | Cdma2000 and IP QoS transparency | In Europe and Asia, there has been a substantial European focus on 'GPRS' and 'Edge' as an implementation option for GSM operators wishing to introduce packet routing and/or higher bandwidth access into existing 2G networks. |
| January | Device access networks - will the pot call the kettle back? (1) | The future prospects for universal connectivity look pretty dim - will the pot call the kettle back? - only if it speaks the same language. |