OUR PHILOSOPHIES

We believe that communication should utilize open space, it does not involve any construction between point A to point B. The traditional copper cable was designed for telephone voice grade at 3Khz, technology has push that boundary to achieve speed that once was thought impossible up to 24Mbps, most pople will get on average 6Mbps download, ideally broadband should be 100Mbps or more to meet the demand of proper interactive video transmission. Wireless is still at its early stage, we believe it can economically push speed beyond current ADSL limit. OFDM, MIMO and SMART antenna system, improve radio sensitivity are the things of the future. Wireless has huge room to move to push the speed to an unimaginable limit.

OUR GOALS AND DREAMS

Our dream is to transform the power of wireless technology into a user friendly internet connectivity to all homes and businesses. Over many years we watched the evolution of wireless going through many forms as the speed improve faster waves after waves. This brought the success of WIFI which give us the freedom to surf the internet freely without any wire attached.

Seeing the uncharted potentials and the opportunities of the technology, we were very keen to extend the wireless technology to outdoor use. Initially we tried using WIFI outdoor, but were quick to realise that it has a serious flaw. After going through a great length in order to understand the WIFI protocol 802.11(a/b/g), we learnt that WIFI does exactly what it is indended for, ie only good for indoor use and does not function outdoor. It lacks of the correct timing to communicate over distance, it has no smart error correction, clients talk to the base whenever it wants causing a phenomenon called hidden node problem, actual data rate is extremely inefficient, signal could be strong enough to modulate at 54Mbps yet actual data transfer is still only 25Mbps.

Outdoor system on the hand are designed very differently, it is built with the knowledge that it will expose to many hash variables and all are addressed to reliably use the system under such condition. We filter out all the marketing noise and only select the best outdoor radio after going through a tough rigorous criteriors. Some of our refinements are it has to perform rain or shine, could withstand the scorching sun, continue to work in high RF nois, scalable capacity to allow growth and to cover large population, error correction to allow smooth internet transactions, efficient protocol that wisely utilize RF spectrum, intelligent coordinate system amongst each other such as synchroise timing to reuse spectrum. Of cause ultimately it must meet our most important goal ie able to provide the user friendly service we sought after.

WIRED ADSL Vs. WIRELESS

ADSL and Wireless share the same underlying modulation methods, what make the two technogies different is the medium that they use to carry the signal once it leaves the transmitter.

ADSL utilize existing telephone cables which connect every homes and businesses to nearby exchange. Wireless transmit its signal in open space. Telephone cable has an electrical properties that allow ADSL signal to transmit at a frequency 1Mhz or 2Mhz at short range as used by ADSL2. Wireless can transmit any bandwidth, any frequency, typically WIFI use 20Mhz channel, the newer generation of wireless WIMAX will be any where between 1.75Mhz to 10Mhz.

Shanon law state that Bit Rate = BW * log₂(1+S/N). One can observe that there are two components that dictate the bit rate, bandwidth and S/N. Increase BW increases bitrate, likewise increase S/N increases bit rate but only at log2. ADSL has very small bandwidth, typically 1Mhz or 2Mhz with ADSL2 at short range compare wireless 5-20Mhz, thus it requires very high power to create a strong S/N, and there higher bit rate. Wireless do exactly the opposite, it uses very low power at high bandwidth 10 to 20Mhz to make up its high speed.

ADSL has a dedicated path to each service as each telephone cable are connected separately. Wireless share the medium amongst each clients within base station coverage space, however upcoming technologies can beam focus to talk to individual client using a narrow beam. Multiple antennas used in MIMO technologies can substantially increase capacity.

Telphone cables are primary owned by large telephone carriers. Unlicense frequencies such 2.4, 5.8Ghz are free public band, known as class license in Australia. It is popular amongst smaller players that has the experties to setup service, without having to invest billion of dollar to setup infrastructure.

Precision Wireless Pty Ltd.