RTT Technology Topics - 2000
We help companies and organisations maximise returns from existing technology and engineering investment.
| 2000 | Title | Synopsis |
|---|---|---|
| December | Simple phase noise measurement | Two methods of noise measurement that can be used to give accurate relative measurements. |
| November | Frequency multiplication | The frequency multiplication process can be applied to both narrow band and wideband sources. Narrowband sources could include crystal oscillators or direct digital synthesisers. Applications for narrow band very high purity requirements are found in design and development reference oscillators, production test equipment, specialist narrow band transmitter/receiver applications and communication satellite down converters. Wideband applications would include the multiplication of wide range low frequency sources applied to up converting transmitters (base stations), test equipment and swept frequency calibration sources. |
| October | The wireless web | User expectations will contend to change over time. The web mix shift will mean that web based content will move from a text and image based medium towards true multi-media, accessed from an integrated 3G/DVB appliance - (the 3G PC) - a complex content capture device - the basis for the wireless web. |
| September | Wireless IP | Wireless IP is used, generically, to describe the application of TCP/IP (transmission control protocol/Internet protocol) to wireless networks. Wireless IP encompasses IP based traffic management, IP based network management, IP based mobility management and IP based access management. |
| August | 3G Fixed access | The number of technology options available together with a fragmented standards process will almost certainly prevent any one dominant technology emerging as a generic fixed access wireless solution. |
| July | End to end connectivity constraints | Complex content passes across a complex delivery channel in which microjitter and macrojitter conspire to produce variable end to end delay - the summation of access latency, network latency, application latency creating access jitter, network jitter and application jitter which in turn compromises the quality of highly compressed differentially encoded information streams - the end user experience will likely be highly variable and made worse by any inherent variability in the wireless access channel - thus highlighting the need for good quality consistent wireless access connectivity. |
| June | 2G Connectivity constraints | The fundamental differences between 2.5G (GPRS/EDGE and IS95 MDR) and 3G (IMT2000 MC and IMT2000DS) air interface implementation will mean that user quality benchmarks in IMT2000MC/DS will be substantially higher. This should be unsurprising - there would be no point in moving from one technology to the next if the new technology did not at least promise to deliver a significant performance improvement. To say that 2.5G air interfaces will deliver an equivalent user experience in terms of image and video streaming quality is disingenuous at best |
| May | The 3GPC | The form factor and functionality of the 3G PC and it's relationship with 3G wireless and wireline internet networks. |
| April | 3G Content capture | Image capture/content capture devices. |
| March | 3G Displays | Displays are memory devices! The image memory is captured and held between refresh frames in the phosphor state (CRT) or liquid crystal state. Display drivers will also need increasing amounts of memory bandwidth .Displays are one of the critical enabling technologies of the 3G transition - in particular, we need to qualify the performance needed to deliver and display fast moving complex content. |
| February | 3G Compression | Compression techniques may well provide the technology trigger for 3G TV and 3G cellular convergence. MP4 will substantially change the form factor and functionality of the application layer in user devices which in turn will substantially change the performance required from the 3G physical layer. |
| January | 3G Memory | Investing in memory bandwidth includes investing in transport bandwidth, network bandwidth (data warehousing for re-sale to subscribers) and terminal resident bandwidth - the returns from investing in memory bandwidth will be higher than an equivalent investment in delivery bandwidth (whether wireless or wireline). Optimizing the distribution of memory bandwidth will be a key design parameter in 3G network implementation. For wireless, where power constraints limit the amount of instantaneous accessibility available, it makes particular sense to invest in memory bandwidth in the user appliance (subsidized memory bandwidth). |