Abstract:
Transpositional Modulation, TM: The idea behind it can be seen as superimposing two different modulations in the same time/frequency resource. More in details: TM produces first a conventionally modulated (QAM, PSK... ) carrier signal, extracts its carrier, slightly modifies it so that the carrier wave also carries information at the pace of one bit per carrier wave period (more than 1 Gbit/s for LTE), and superimposes both signals for transmission. At the receiver, successive interference cancellation is performed: First conventionally modulated signal is detected, subtracted from received signal, and then TM signal is detected. The TM modulation implies third harmonic processing at the transmitter and receiver.
Abstract:
Techniques are described for wireless communication. A first method includes inserting channel or interference estimation modulation symbols into a sequence of data modulation symbols; performing a discrete Fourier transform (DFT) on a group of modulation symbols in the sequence of data modulation symbols, the group of modulation symbols including at least one of the channel or interference estimation modulation symbols; and generating a single-carrier frequency domain modulated (SC-FDM) symbol stream based at least in part on an output of the DFT. A second method includes performing an IDFT on a tone-demapped output of a DFT for each of at least one SC-FDM symbol stream, to recover a plurality of data modulation symbols and channel or interference estimation modulation symbols for each of the at least one SC-FDM symbol stream; estimating interference based at least in part on the channel or interference estimation modulation symbols; and decoding the data modulation symbols based at least in part on the estimated interference.
Abstract:
One of the embodiments of the present invention relates to a method for modulation. The method comprises: providing a first bit sequence of continuous bits "1" or continuous bits "0" generating a second bit sequence by replacing, in each of a plurality of modulation intervals with a predetermined bit number, at least one bit of the first bit sequence at at least one fixed position of the respective modulation interval with one information bit from an information bit sequence; and modulating the second bit sequence so as to generate a positioning packet with a modulated continuous wave signal for transmission. The embodiments further relate to a method for demodulation. Embodiments of the present invention also provide corresponding apparatuses and computer program products.
Abstract:
An apparatus for providing a modulated bitstream in dependence on a modulation content comprises a mapper configured to selectively provide a carrier bitstream portion or an inverted carrier bitstream portion in dependence on a binary value of the modulation content bitstream representing the modulation content, to obtain the modulated bitstream.
Abstract:
A method of transmitting and receiving a signal and an apparatus for transmitting and receiving a signal are disclosed. The method includes receiving the signal of a first frequency band, obtaining layer-1 information from a preamble of the first time-frequency slicing (TFS) signal frame of the received signal, said layer-1 information including a radio frequency (RF) channel identifier of a first TFS signal frame including the PLP in a super frame of TFS structure, and an identifier of a starting radio frequency (RF) channel which can receive the PLP in the TFS signal frame, parsing the TFS signal frame using the layer-1 information and obtaining a physical layer pipe (PLP) of the TFS signal frame, and converting the PLP to a service stream.
Abstract:
A frequency modulation method, system and computer readable-medium for enabling high speed, reliable and simple digital data modulation, transmission and reception. The system of the present invention includes a Synthetic Harmonic Waveform Generator for generating harmonic waves of the form cos(2πƒ dev t) from a digital data bit stream. The system of the present invention uses the generated harmonic waves to create a frequency modulation signal of the form sin(2πƒ carrier t±2πƒ dev t), which is then transmitted. The present invention also includes a demodulation technique for receiving a signal of the form sin(2πƒ carrier t±2πƒ dev t), which is used to determine whether a "1" or "0" digital bit has been transmitted.
Abstract:
The disclosure relates to an error-compensated direct digital modulation device (800), including: a direct digital radio frequency modulator (DDRM) (801), configured to generate a radio frequency (RF) signal (804) based on a modulation of a digital baseband signal (802); an error estimator (803) configured to determine an error signal (806) resulting from a deviation based on the generated RF signal (804) and a representation of the digital baseband signal (802); and an error compensator (805) configured to subtract the error signal (806) from the RF signal (804) to provide an error compensated RF signal (808).
Abstract:
Systems and techniques for communicating data as a function of frequency are presented. In an implementation, a system includes a microelectromechanical systems (MEMS) sensor (102), a digital signal processor (104) and a frequency detection circuit (108). The digital signal processor (104) is coupled to the MEMS sensor (102). The frequency detection circuit (108) receives data encoded as a function of frequency from the digital signal processor (104) via a clock communication channel (110).
Abstract:
A system, according to various embodiments, can include an oscillator and a sine synthesizer. The oscillator creates an oscillating clock signal based on binary data representing information to be transmitted. The sine synthesizer creates a sequence of digital sine wave samples at a rate determined by the oscillating clock signal. The sine synthesizer digitally produces approximate solutions to difference equations representing a sine function and cosine function to create the sequence of digital sine wave samples.
Abstract:
Disclosed is a broadcast signal transmitting apparatus, a broadcast signal receiving apparatus, and a broadcast signal transceiving method in a broadcast signal transceiving apparatus. The broadcast signal transmitting method comprises the following steps: compressing the headers of data packets of an IP stream identified by IP address information, wherein the compressed data packets include a first packet, the header of which contains static field information, a second packet, the header of which contains dynamic field information, and a third packet, the header of which contains the compressed static field information and/or the compressed dynamic field information; signaling IP-PLP mapping information for mapping the IP stream and a component PLP for transmitting the IP stream, the IP stream compression information, and the header information of the first packet to L2 signaling information; and transmitting the header information of the second and third packets via the component PLP, and transmitting the L2 signaling information via a common PLP.