X hits on this document





11 / 28


JANUARY 2005 / 11

(2xSTM-1) and 622Mbps (STM-4) us- ing cross-polarization interface cancel- lation technology (XPIC) to double wireless channel capacity. XPIC tech- nology supports CCDP operation by processing and combining the signals from the two receiving paths to recov- er the original, independent signals. By transmitting on orthogonal antenna polarizations and using advanced DSP techniques to cancel interference, the net channel capacity is doubled, opti- mizing the use of valuable spectrum while enabling the use of existing ra- dios.

System vendors can leverage the de- vice to develop a single design for their entire point-to-point product line, from low-capacity, low-cost systems to high-end, high-capacity, feature-rich systems. CCDP operation using XPIC technology allows vendors to expand product offerings into the ultra-high- capacity market. Operators can build networks that transmit up to 311Mbps over 28MHz channels and up to 622Mbps over 50/56MHz channels, achieving a spectral efficiency of 13.5 bits/Hz.

There are three major segments to the broadband wireless transmission mar- ket – cellular backhaul infrastructure, fixed wireless transmission and private wireless networks – all of which can benefit from Provigent solutions. For mobile cellular backhaul, Provigent’s flexible modem can support low- to medium-capacity PDH applications for BTS/Node B and higher capacities of multiple 155Mbps SDH for BSC/ RNC.

For fixed point-to-point (PTP) appli- cations, the PVG310 modem offers a flexible, unified platform that includes all modem functions, allows operators to optimize their expensive spectrum using XPIC, and supports a high bit rate of 622Mbps for applications such as Gigabit Ethernet and STM-4.

For private wireless networks, the PVG310 gives system vendors a sin- gle-modem platform with high spec- tral efficiency, using XPIC mode and an adaptive modulation mechanism. The PVG310 operates in the licensed and unlicensed band using Frequency Domain Duplexing (FDD) or Time Do- main Duplexing (TDD).

The proprietary PTP systems market size was roughly $3.5 billion in 2003, representing a lager opportunity than WiFI during that time period. Today, each of the 150 proprietary PTP sys- tems vendors must design their own in- house solution, an expensive proposition. Provigent provides a sin- gle chip, highly integrated, config- urable, flexible device with improved signal processing and DSP algorithms. As an example, 802.11b and 802.11a/ g systems achieve 1-bit/Hz and 2.7- bits/Hz respectively, and today’s pro- prietary PTP systems achieve 3-5 bits/ Hz, while Provigent’s solution can achieve up to 13.5 bits/Hz.

Direct competitors include chip ven- dors Spacebridge and Sicom/Intersil. Provigent argues that these solutions are based on satellite technology, have limited performance and are less inte- grated. To some degree cable and WLAN components can be used to develop competing solutions, although with performance limitations (30Mbps for cable). In addition, OFDM-based solutions are not appropriate for high frequency systems, according to Provi- gent. Most of the competition comes from expensive in-house efforts at the system vendors. Provigent’s solution is highly integrated, supports dozens of proprietary modes and features im- proved signal processing algorithms. In addition, the company argues that WiMAX represents a large distraction for many vendors.

The PVG310 is fabricated by an Asian foundry in 0.18u CMOS. Point-to-

point radio systems based on the PVG310 are being designed by lead- ing system vendors worldwide. Provi- gent has customers, orders and is shipping production units.

The company had planned on devel- oping the PVG410/420 base station and terminal modems for point-to- multipoint broadband wireless sys- tems; however, these products have been put on hold due to lack of cus- tomer demand. Future plans call for increasing integration and performance for Provigent’s PTP product line.

Eli Harry, Chairman (previously pres- ident and CEO of LanOptics)

Dan Charash, Co-founder & CEO (pre- viously led an interdisciplinary group with expertise in DSP, soft- ware, analog electronics and statis- tics at the Israel Defense Forces)

Guy Resheff, Co-founder and CTO (previously founded and directed a communication system design con- sulting business where he designed broadband wireless modems for Is- raeli companies)

Eli Leizerovitz, VP of Sales and Busi- ness Development (previously VP of Business Development of Snap- shield, a developer of a new plat- form that enables service providers to offer telecom security as a value- added service)

Guy Nathanzon, CFO (previously the controller of Action Base, a devel- oper of software platforms for busi- ness activity intended to better manage organizational boundaries)

Amir Eliaz, VP R&D (previously VP of R&D at Millimetrix, which de- velops SONET/SDH radio links)

171 Main St., #258 Los Altos, CA 94022 Tel: 650/962-0183 Fax: 650/745-7100 www.provigent.com

Copyright Pinestream Communications, Inc. 52 Pine Street, Weston, Massachusetts 02493 USA Tel 781.647.8800 Fax 781.647.8825 www.pinestream.com info@pinestream.com

Document info
Document views60
Page views61
Page last viewedFri Oct 28 00:42:33 UTC 2016