SE523252C2

2G

Title

Not Available

Application Number:

SE19990002040

Publication Date:

06-04-2004

Current Assignee:

Family ID:

Application Date:

03-06-1999

Declaring Company:

Publication Country:

US

Priority Date:

07-08-1986

Title

Not Available

Application Number:

SE19990002040

Family ID:

Publication Country:

US

Publication Date:

06-04-2004

Application Date:

03-06-1999

Priority Date:

07-08-1986

Current Assignee:

Declaring Company:

Abstract  Abstract

A digital wireless subscriber telephone unit for wireless connection with a base station. The subscriber unit has a baseband processor which is coupled to storage device for the baseband functions. The baseband processor is direct access coupled to a modem processor whereby the two processors may communicate with each other. The modem processor generally acts as the master in the system although lock-out circuit may be used in certain circumstances. The signal from the modem processor is converted to an analog signal which is subjected to deglitching and the deglitched signal is then upconverted and filtered to form an IF signal which is thereafter amplified. The amplified IF signal is combined with a signal generated by a synthesizer to provide an RF signal. On the basis of certain signals received from the base station the baseband processor produces initiating signals which determine whether the subscriber unit will be in the transmit mode or the receive mode. In intervals between actuation of the system a training mode is used wherein a known signal from the modem processor is compared with a looped-back signal to produce correction constants to compensate for undesirable variations in the IF these constants being stored for use in correcting actual received signals. During demodulation the modulated digital signals are fed to the modem processor in the form of time multiplexed I and Q samples and are demultiplexed. The demultiplexed I and Q samples are fed to an equalizer and frequency correction circuit for minimization of errors and for production of a frequency correction signal which is used to correct any errors in the timing of the system and in the output of the synthesizer.

Note:

The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)

The information in grey was provided by the patent holder

The information in purple was extracted from the FrandAvenue

Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.

Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.

Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.

Family member:related patents or applications that share a common priority or original filing.