The broadband wireless transmission industry is an inseparable part of the overall telecommunications infrastructure industry and is traditionally the technology of choice for many operators. Wireless transmission systems present operators, service providers and organizations with an independent, reliable, flexible, high-capacity infrastructure that is quickly deployed and scaled up. It is a cost-effective and operationally advantageous solution.

Broadband wireless transmission systems can be divided into three major segments:

• Cellular backhaul infrastructure
• Fixed wireless transmission networks
• Private wireless networks

Wireless transmission infrastructure for mobile cellular backhaul is an alternative to the fiber or copper infrastructure. To cellular and personal communications services operators, wireless backhaul offers a considerable advantage over traditional infrastructure solutions, in terms of costs, time-to-market, and flexibility of range, capacity and location.

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. Its flexibility and features also make it a single-platform solution for wireless backhaul, supporting the various capacities of cellular networks. The modem supports today’s 2G+ cellular networks, with their packet-based protocols such as Internet browsing, and supports tomorrow's 3G cellular networks, which will include new features like adaptive modulation to better utilize the limited bandwidth.

Fixed wireless transmission is traditionally the technology of choice for public telephone companies, ILECs (incumbent local exchange carriers), CLECs (competitive local exchange carriers), and other operators.

As licensed band point-to-point (PTP) systems are adapted to current market trends, vendors are required to reduce system costs while improving their performance. Provigent's PVG310 modem for fixed PTP applications addresses these problems by offering a flexible, unified platform that includes all modem functionalities, thus leading to reduced overall system-level costs.

Additionally, as operators wish to reduce their spectrum licensing costs, the demand for higher spectral-efficient licensed band PTP systems grows. The PVG310 provides a highly spectral-efficient mode of operation and cross-polarization (XPIC), which allows operators to optimize their expensive spectrum. The PVG310 can support a high bit rate of 622Mbps for applications such as Gigabit Ethernet and STM-4.

Traditionally, private networks have mostly been the domain of governments and enterprises. However, utility backhaul such as gas and oil installation, connectivity between buildings within a campus, and IP-network backhauling for wireless ISPs are becoming a significant growth engine for wireless transmission systems.

Many private networks carry high-bit-rate IP traffic. The Provigent PVG310 gives system vendors a single-modem platform with high spectral 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 Domain Duplexing (TDD).