RoF technology holds promise for wireless and wireline on a single platform

Oct 16, 2012
Wireless and wireline on a single platform
Credit: Thinkstock

EU-funded scientists experimentally and theoretically validated technology for the future convergence of wireless and wireline communications into a common infrastructure.

The information revolution demands continuously increasing speed and reliability with virtually limitless access. The next step in the evolutionary process is a convergence of wireless and wireline transmission into a common infrastructure.

Phase-modulated radio-over-fibre (RoF) technology is an important candidate for implementing multi-channel (via so-called wavelength-division multiplexing, or WDM) wireless-wireline access networks.

RoF integrates fibre optic networks with wireless ones. are transported from a radio base station to a remote antenna via and then radiated through the air via end users' mobile stations.

are part of the that consists of all possible in the form of photons. The photons travel in waves defined by peaks and troughs, much as water rippling out from a stone thrown in a pond.

The distance from one peak to another (or one trough to another) is the wavelength. The distance from centre to peak is the amplitude which is related to the intensity of the light. The phase of a signal is the position of the wave at a certain time relative to a reference – imagine ripples spreading out in a pond passing by a stationary object such as a reed.

Modulating data to be transmitted based on the phase of the carrier signal (phase modulation) has important benefits compared to conventional intensity modulation.

set out to experimentally and theoretically evaluate the performance of multi-channel phase-modulated RoF optical links in transmission of wireless-wireline signals.

With EU funding of the 'WDM -modulated radio-over-fiber systems' (Woprof) project, investigators did so, comparing performance to that of conventional intensity-modulated RoF links. They created a phase-modulated RoF link and conducted convergence experiments with broadband wireline services and high-speed wireless signals.

Finally, the team also identified a new wireless technology for short-range in-home applications that has been met with great enthusiasm worldwide.

Woprof results have advanced the communications sector toward convergence of wireless and wireline systems into a common infrastructure. Along the way, the Woprof team may have come up with tomorrow's fastest technology to transfer videos and pictures from a cell phone to a PC.

Explore further: Verizon launches rewards program with tracking

add to favorites email to friend print save as pdf

Related Stories

Recommended for you

Twitter admits to diversity problem in workforce

48 minutes ago

(AP)—Twitter acknowledged Wednesday that it has been hiring too many white and Asian men to fill high-paying technology jobs, just like several other major companies in Silicon Valley.

Swiss drug maker Roche posts 7 percent profit drop

1 hour ago

(AP)—Swiss drugmaker Roche Holding AG on Thursday posted a net profit drop of 7 percent compared with a year ago, weighed down by a strong Swiss franc and charges from one of its diagnostic units.

Social Security spent $300M on 'IT boondoggle'

12 hours ago

(AP)—Six years ago the Social Security Administration embarked on an aggressive plan to replace outdated computer systems overwhelmed by a growing flood of disability claims.

Cheaper wireless plans cut into AT&T 2Q profit

12 hours ago

(AP)—AT&T Inc. on Wednesday posted lower net income for the latest quarter due to cheaper cellphone plans it introduced as a response to aggressive pricing from smaller competitor T-Mobile US.

User comments : 0