According to an aspect of the present invention, there is provided a method for providing additional bandwidth to receivers that can decode a higher modulation comprising trading a peak-to-average power ratio (PAPR) reduction induced constellation noise of all or a subset of in-band on-channel (IBOC) carriers within an orthogonal frequency division multiplexing (ODFM) waveform with data carrying superposition modulation.

Provided is a transmission method that improves data reception quality in radio transmission using a single-carrier scheme and/or a multi-carrier scheme. The transmission method includes: generating a plurality of first modulated signals s1(i) and second modulated signals s2(i) from transmission data, the plurality of first modulated signals s1(i) being signals generated using a QPSK modulation scheme, and the plurality of second modulated signals s2(i) being signals generated using 16QAM modulation; generating, from the plurality of first modulated signals s1(i) and the plurality of second modulated signals s2(i), a plurality of first signal-processed signals z1(i) and a plurality of second signal-processed signals z2(i) which satisfy a predetermined equation; and transmitting the plurality of first signal-processed signals z1(i) and the plurality of second signal-processed signals z2(i) using a plurality of antennas. A first signal-processed signal and a second signal-processed signal having identical symbol numbers are simultaneously transmitted at the same frequency.

A method can be performed by a first node for determining a parameter of physical (PHY) layer circuitry of a second node. The method can include implementing a cascaded hierarchy of techniques to determine, based on an electrical signal from a second node, a parameter of the PHY layer circuitry of the second node, and causing an antenna of the first node to transmit an electromagnetic wave consistent with the determined parameter.

A method and system are discussed for providing Unequal Error Protection (UEP) for heterogeneous multi-service provisioning. A transmitter in a network may determine a current status of the network. The transmitter may adaptively adjust a current asymmetric signal constellation and a current channel Forward Error Correction (FEC) coding rate based on the determined current status of the network, and initiate transmission of multi-service data, using the adaptively adjusted asymmetric signal constellation and the adaptively adjusted FEC coding rate for transmission of the multi-service data, based on hybrid Unequal Error Protection (UEP) transmission.

A method and system are discussed for providing Unequal Error Protection (UEP) for heterogeneous multi-service provisioning. A transmitter in a network may determine a current status of the network. The transmitter may adaptively adjust a current asymmetric signal constellation and a current channel Forward Error Correction (FEC) coding rate based on the determined current status of the network, and initiate transmission of multi-service data, using the adaptively adjusted asymmetric signal constellation and the adaptively adjusted FEC coding rate for transmission of the multi-service data, based on hybrid Unequal Error Protection (UEP) transmission.

A method and an apparatus for performing a Superposition Coded Modulation (SCM) scheme in a broadcasting or communication system including a controller are provided. The method includes controlling an SCM coefficient by the controller. The SCM coefficient is controlled according to a channel capacity of each layer of one or more layers in which information included in a signal is encoded.

This application provides a multichannel-based signal transmission method and apparatus. The method includes: combining N groups of lower-order modulation symbols into N groups of higher-order modulation symbols, where an ith higher-order modulation symbol in each group of higher-order modulation symbols is obtained by combining ith lower-order modulation symbols in all the N groups of lower-order modulation symbols, each group of lower-order modulation symbols includes M lower-order modulation symbols, i=1, 2, . . . , M, N is a positive integer greater than 1, and M is a positive integer greater than 1; determining N to-be-sent signals based on the N groups of higher-order modulation symbols; and sending a kth to-be-sent signal in the N to-be-sent signals by using a kth channel in N channels, where k=1, 2, . . . , N.

A signal transmission method includes: combining a plurality of low-order modulated signals into N modulated signals; and transmitting the N modulated signals on N subcarriers, where the N subcarriers are subcarriers on frequency domain resources of M channels, an n.sup.th modulated signal in the N modulated signals is transmitted on an n.sup.th subcarrier in the N subcarriers, N is an integer greater than or equal to 2, M is an integer greater than or equal to 2, and n=1, 2, . . . , N. The signal transmission method can improve efficiency of a diversity gain.

Provided is a transmission method that improves data reception quality in radio transmission using a single-carrier scheme and/or a multi-carrier scheme. The transmission method includes: generating a plurality of first modulated signals s1(i) and second modulated signals s2(i) from transmission data, the plurality of first modulated signals s1(i) being signals generated using a QPSK modulation scheme, and the plurality of second modulated signals s2(i) being signals generated using 16QAM modulation; generating, from the plurality of first modulated signals s1(i) and the plurality of second modulated signals s2(i), a plurality of first signal-processed signals z1(i) and a plurality of second signal-processed signals z2(i) which satisfy a predetermined equation; and transmitting the plurality of first signal-processed signals z1(i) and the plurality of second signal-processed signals z2(i) using a plurality of antennas. A first signal-processed signal and a second signal-processed signal having identical symbol numbers are simultaneously transmitted at the same frequency.

In one aspect, performing, by a wireless communication device, a non-coherent encoding operation on first data to generate a first transmission, wherein the non-coherent encoding operation encodes data independent of channel state information (CSI); and transmitting, by the wireless communication device, the first transmission, wherein the first transmission is non-coherently encoded. In another aspect, receiving, by a wireless communication device, a first transmission, wherein the first transmission is non-coherently encoded independent of channel state information (CSI); and performing, by the wireless communication device, a non-coherent decoding operation on the first transmission to decode the first transmission. Other aspects and features are also claimed and described.