What is Transpositional Modulation?
Transpositional Modulation (TM), a patented radio frequency waveform technology that offers dramatic bandwidth increases for existing wireless and wired networks. TM accomplishes this by enabling the simultaneous transmission of two or more distinct data paths on a single carrier signal. This effectively doubles the efficiency of the carrier wave.
This data rate increase is implemented transparently (with insignificant noise effects). Because TM is a bits-in-bits-out method, its transparency is agnostic to, and functions well with such existing compression, encryption or coding methods. This transparency is compatible even with such complex modulations such as QAM or n-PSK. Ongoing research for its use with OFDM is promising.
Transpositional Modulation (TM) is the only known form of modulation that is mutually transparent to other forms of modulation when used simultaneously. In effect, because of its transparency and ultra-efficient characteristics, TM allows a single carrier wave to transmit two or more signals simultaneously instead of one as with other modulations, without destroying the integrity of the individual bit streams.
Due to its unique properties and methods using advanced algorithms and digital-signal processing, TM can in many cases enable transmission of multiple times more data than existing modulations, making it the most efﬁcient method known. Even more signiﬁcant, TM can coexist simultaneously in a signal transmission with the existing modulation technologies, on the same frequency and waveform, allowing one carrier wave to transmit more data for a given bandwidth.
TMT is developing products for a range of applications. These products will use our core technology to provide solutions and create value for our customers, the economy, and the wireless infrastructure throughout the world.
Significantly, TMT is presently implementing its TM-256 core, via a development and use license contract with DragonWave-X, into a line of carrier microwave backhaul radios. This is expected to result in a data rate of 16 bits per second per Hertz (b/s/Hz) at the same low noise level as QAM256. In effect, this will be equivalent to a 65536QAM but at a 256QAM noise level!
TMT has also demonstrated a TM-PSK which the Company feels will be highly desirable in satellite communications.
Historically, TM Technologies demonstrated the operation of TM in an analog format and frequency in 2013 after 4 years of intense research and development. TM was then crudely mathematically implemented in a digital signal processing (“DSP”) format within an SDR radio in the first quarter of 2017. In April of 2018, a renowned and independent signals analysis firm validated the efficiency of TM256 over QAM, stating, “…The information rate for the QAM256-only mode was observed to be 32.5Mbps. When operating in QAM+TMQAM mode, the uncorrected (ie..no FEC) information rate was observed to be 62.5 Mbps. Both QAM256 and QAM+TMQAM implementations were completely contained within the FCC spectral mask…based on the doubling of the information rate within the confined channel, a two times improvement in spectral efficiency was observed as compared to a traditional QAM256 signal.”
We believe the capabilities that TM allows should revolutionize the communications industry and prove very disruptive.