Orthogonal Time Frequency Space
Orthogonal Time Frequency
Space (OTFS) is a 2D modulation technique that transforms the
information carried in the Delay-Doppler coordinate system. The
information is transformed in the similar time-frequency domain as
utilized by the traditional schemes of modulation such as TDMA,
CDMA, and OFDM. It was first used for fixed wireless, and is now a
contending waveform for 6G technology due to its robustness in
high-speed vehicular scenarios.
OTFS
is a modulation scheme where each transmitted symbol experiences
a near-constant channel gain even in channels at high carrier
frequencies (mm-wave) or with high Doppler. OTFS essentially
performs modulation in the the Delay-Doppler (time-frequency)domain.
It effectively transforms
the time-varying multipath channel into a 2D channel in the
Delay-Doppler domain. Using this transformation, along with
equalization within this domain, each symbol experiences similar
channel gain throughout the transmission.
The modulation begins with
first mapping the information symbols x[k,l] in the Delay–Doppler
domain to symbols X [n, m] for creating the time-domain signal s(t)
which is transmitted over a wireless channel. At the receiver end,
the time-domain signal r(t) is mapped to the domain of
time-frequency using the Wigner transform which is the inverse of
Heisenberg transform and then for symbol demodulation uses the
Delay–Doppler domain.
The technology has been used in 5G networks and is being considered
for
6G networks.
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Processors, Optical Modems, Optimum or Robust Multi-User or
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inventors of PLC MODEMS, Optimum or Robust Multi-User or
Single-User MIMO fixed or mobile packet radio structures in the
world.
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TACS Science
Technology Engineering is a leading concept technology provider and
top science
technology engineering and consultancy firm in the field of information communication
and energy technologies (ICET).
The heart of our consulting spectrum comprises strategic,
organizational, and technology-intensive tasks that arise from the use of new
information, communication and energy technologies.
The major emphasis in our work is found in innovative consulting and
implementation solutions which result from the use of modern information,
communication and energy technologies.
TACS Science
Technology Engineering and Consulting
- Delivers the insight and vision
on technology for strategic decisions
- Drives
innovations forward as part of our service offerings to customers
worldwide
- Conceives
integral solutions on the basis of our integrated business and technological
competence in the ICET sector
- Assesses technologies and standards and develops
architectures for fixed or mobile, wired or wireless communications systems
and networks
- Provides
the energy and experience of world-wide leading innovators and experts in their fields for local,
national or large-scale international projects.
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