Spread-spectrum transmitter and receiver

H - Electricity – 04 – B

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

H04B 7/04 (2006.01) H04B 15/00 (2006.01) H04B 7/06 (2006.01) H04B 7/26 (2006.01) H04Q 7/36 (2006.01) H04B 1/69 (2006.01)

Patent

CA 2223358

A transmitter is provided in a base station which communicates with a mobile station of a high-speed communication user and a mobile station of a low-speed communication user according to a spread spectrum system. The transmitter includes a first antenna having a wide directivity, a second antenna having a directivity narrower than that of the first antenna, a first transmission unit for transmitting a first transmission signal from the first and second antennas to the mobile station of the low-speed communication user, and a second transmission unit for transmitting a second transmission signal from the second antenna to the mobile station of the high-speed communication user. In addition, a receiver provided in the mobile station of the low-speed communication user includes a receiving unit for receiving the first transmission signals sent from the first and second antennas of the base station, a first demodulator for despreading the received first transmission signal using a despreading code, a delay element for delaying the despreading code by the predetermined period of time, and a second demodulator for despreading the received first transmission signal using the delayed despreading code.

Un émetteur est installé dans une station de base pour communiquer avec une station mobile de communication à grand débit et une station mobile de communication à faible débit dans un système à étalement du spectre. Cet émetteur comporte une première antenne à diagramme de rayonnement large, une seconde antenne à diagramme de rayonnement plus étroit que celui de la première antenne, une première unité de transmission servant à transmettre un premier signal de transmission à la station mobile de communication à faible débit par la première et la seconde antennes, et une seconde unité de transmission servant à transmettre un second signal de transmission à la station mobile de communication à grand débit par la seconde antenne. De plus, le récepteur installé dans la station mobile de communication à faible débit comprend une unité de réception du premier signal transmis par la première et la seconde antennes de la station de base, un premier démodulateur servant à désétaler ce premier signal au moyen d'un code de désétalement, un élément retardateur servant à retarder le code de désétalement de l'intervalle de temps prédéterminé, et un second démodulateur servant à désétaler le premier signal en utilisant le code de désétalement retardé.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Spread-spectrum transmitter and receiver does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Spread-spectrum transmitter and receiver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spread-spectrum transmitter and receiver will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1770293

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.