HP Adds Non-intrusive Co-channel Interference Detection to GSM-based Drive Test System.PALO ALTO Palo Alto, city, California
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Hewlett-Packard Company today introduces non-intrusive co-channel interference The confusion in the tuning circuit of a wireless receiver due to a second wireless signal being detected with the same frequency. Due to weather conditions, wireless communications systems (radio, TV, etc. detection for the HP E7475A GSM-based drive test system, the first receiver-based measurement system to offer this capability at such a low price.
Co-channel interference, a problem for GSM-based wireless network operators, occurs when two base stations with overlapping coverage areas broadcast on the same frequency. The resulting interference can cause dropped calls or other transmission problems.
Special algorithms in the GSM drive test system's receiver detect co-channel interference and decode the base station identity code (BSIC BSIC Base Station Identity Code
BSIC Banque Sahélo-Saharienne pour l'Investissement et le Commerce (French: Sahalian-Saharan Investment and Trade Bank)
BSIC Base Station Identification Code
BSIC Blind Spatial Interference Canceler ) of the primary and secondary interfering signals. Network operators can locate the sources of co-channel interference without turning off base stations, which creates holes in coverage.
The HP E7475A GSM-based drive test system, introduced in 1998, is used by wireless-network operators and network-equipment manufacturers to measure the performance of the air interface. The integrated receiver-and-phone-based system provides comprehensive RF-measurement and call-performance data as a function of location.
The system measures channel power and decodes broadcast-channel BSICs for trouble-shooting interference problems. It also makes continuous-wave (CW) and channel-power measurements on multiple channels with high accuracy for cell-site evaluation and interference management.
Configurations of the drive test system are available for E-GSM900, DCS (1) See also DSC.
(2) Digital Cross-connect System) A network switching and grooming device used by telecom carriers. See digital cross-connect. 1800, GSM1900 and dual-band GSM900/DCS1800 networks. HP digital receivers and test mobile phones are integrated with Windows(R) 95, Windows 98 and Windows NT (Windows New Technology) A 32-bit operating system from Microsoft for Intel x86 CPUs. NT is the core technology in Windows 2000 and Windows XP (see Windows). Available in separate client and server versions, it includes built-in networking and preemptive multitasking. (R)-based measurement software running on a laptop computer.
Up to four receivers and four phones can be integrated into a single drive test system and controlled from an integrated user interface.
Information on HP's GSM-based drive test system can be found at http://www.tmo.hp.com/tmo/datasheets/English/HPE7475A.html.
U.S. Pricing and Availability
Non-intrusive co-channel interference detection for the HP E7475A is available now as a free upgrade.
Windows and Windows NT are U.S. registered trademarks of Microsoft Corp.
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