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Method for pass-band signaling for computer communications

IP.com Disclosure Number: IPCOM000029130D
Publication Date: 2004-Jun-16
Document File: 2 page(s) / 19K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for pass-band signaling for computer communications. Benefits include improved functionality, improved performance, and improved design flexibility.

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Method for pass-band signaling for computer communications

Disclosed is a method for pass-band signaling for computer communications. Benefits include improved functionality, improved performance, and improved design flexibility.

Background

              A typical computer communication channel utilizes baseband signaling techniques to transmit digital information. An alternative method of communication utilizes pass-band signaling techniques. Pass-band signaling (frequency division multiplexing) is achieved by modulating a baseband signal with a carrier. Multiple baseband signals can be modulated by different carrier frequencies.

              Pass-band signaling techniques have previously been applied to noncomputer communication channels. Conventionally, computer communication channels have used baseband signaling techniques.

Description

              The disclosed method is pass-band signaling for computer communications. Multiple types of modulation are used for multichannel communication, including (see Figure 1):

•             Amplitude modulation (AM)

•             Frequency modulation (FM)

•             Phase modulation (PM)

•             Quadrature amplitude modulation (QAM)

•             Binary phase-shift keying (BPSK)

•             Binary frequency shift keying (BFSK)

•             Differential phase-shift keying (DPSK)

•             Differentially encoded phase-shift keying (DEPSK)

•             Quadrature phase-shift keying (QPSK)

•             Quadrature amplitude shift keying...