User Name


Password


Digital Modulation Systems
Project Game Changer

IBOC - iBiquity Digital AM

 

"While in development, I tweaked on-the-bench, iBiquity's Digital AM system. Now there's no digital noise. DJROCK technology gives them a new analog AM Stereo method with 8,000 Hz of audio bandwidth and beyond 500 kb/s of raw data in the remaining 4 kHz of spectrum space. I restored the conventional +/-10 kHz FCC mask in the process."

 

 

PROJECT GAME CHANGER

 

DJROCK has invented revolutionary digital modulation technology that exponentially increases the data-thru-put of today's digital broadcast and telecommunications methodologies.

This is not a mere enhancement of existing technology - this is a complete "Game Changer".


IBOC: In Band - On Channel Digital Radio

 

IBOC is acronym for "In Band - On Channel". It describes an evolutionary process to digitize antiquated AM and FM radio broadcasting systems which were originally designed to convey analog audio exclusively.

 

The explicit objective of IBOC is to augment existing AM and FM radio signals with bits and bytes that are embedded within the same carrier frequency in an effort to simulcast a new digital signal with an old analog signal. The implicit objective of IBOC is to set the stage to potentially eliminate the analog signal at a future date.

Two organizations are highly regarded around the world for implementing a range of IBOC technologies, namely: Digital Radio Mondiale and iBiquity Digital Corporation.

 


Digital Radio Mondiale (DRM30 & DRM+)

 

Digital Radio Mondiale (Mondiale means around-the-world) is a non-profit international organization innovating a variety of methods to digitize radio signals. DRM30 refers to the technology implemented under 30 MHz, which includes the Long Wave, Medium Wave and Short Wave, AM bands. DRM+ refers to the technology implemented between 30 and 174 MHz.

DRM30 typically utilizes a digital modulation system referred to as Coded Orthogonal Frequency Division Multiplexing (C-OFDM) which is comprised of a number of harmonically related parallel sub-carriers that are Quadrature Amplitude Modulated (QAM).

Within a spectral bandwidth of 10 kHz, DRM30, at its maximum digital modulation rate of QAM-64, is capable of transmitting less than 50 kilobits-per-second (kb/s). When redundancy bits are factored in to provide robustness and error correction, the data thru-put falls to less than 20 kb/s.


iBiquity HD-AM Radio


iBiquity Digital Corporation is a privately held USA based company made up of a long list of partners including consumer and broadcast electronics manufacturers, semiconductor and electronic component manufacturers, auto makers, retailers and wireless data service providers. Its primary objective is to"roll-out" its digital modulation systems for use on the commercial AM and FM bands in the USA and elsewhere.

iBiquity HD-AM, like DRM30, typically utilizes a digital modulation system referred to as Coded Orthogonal Frequency Division Multiplexing (C-ODFM), which is comprised of a number of harmonically related parallel sub-carriers that are Quadrature Amplitude Modulated (QAM).

Within a spectral bandwidth of 10 kHz, iBiquity HD-AM, at its maximum digital modulation rate of QAM-64, is capable of transmitting less than 50 kilobits-per-second (kb/s). Like the DRM30 system, when redundancy bits are factored in to provide robustness and error correction, the data thru-put falls to less than 20 kb/s.

 

Layer 1 - Physical Layer


IBOC specifications are derived from the 'International Standards Organization - Open Systems Interconnections' networking model, which defines a protocol built on seven functional layers.

DJROCK has invented a new Layer 1 or Physical Layer, which includes a revolutionary digital modulation system that is capable of transmitting raw data with a thru-put in excess of 500 kb/s within a spectral bandwidth of under 4 kHz. This is exponentially greater than the prior art and is a complete game changer.

Home / About Us / Research / Patents / Contact

2016 DJROCK dot com. All rights reserved.