# US 8,787,476 B2 · Method and apparatus for allocating a plurality of data symbols in a wireless communication system

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- Number: US 8,787,476 B2
- Document ID: US8787476B2
- Status: Granted
- Kind: B2
- Application number: 13/963,916
- Filed: 2013-08-09
- Published: 2013-12-12
- Granted: 2014-07-22
- Earliest claimed: 2005-06-15
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Hak Seong Kim; Bong Hoe Kim; Dong Wook Roh; Joon Kui Ahn; Dong Youn Seo; Jung Hoon Lee
- Web page: https://patentgrep.com/patent/US8787476B2

## CPC

- H04L 27/26526: {with inverse FFT [IFFT] or inverse DFT [IDFT] demodulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] receiver or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]}
- H04B 7/0452: Multi-user MIMO systems
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- H04L 5/0037: {Inter-user or inter-terminal allocation}
- H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH}
- H04L 5/0046: {Determination of the number of bits transmitted on different sub-channels}
- H04L 5/0042: {Intra-user or intra-terminal allocation}
- H04L 5/023: {Multiplexing of multicarrier modulation signals, e.g. multi-user orthogonal frequency division multiple access [OFDMA] (multicarrier modulation H04L27/2601)}
- H04L 27/2618: {Reduction thereof using auxiliary subcarriers}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04B: TRANSMISSION

## Abstract

According to one embodiment, a method for transmitting an uplink signal includes transmitting the uplink signal including a block of data symbols. The block of data symbols are mapped to at least two sets of subcarrier blocks. Each data symbol of the block of data symbols is mapped to one of subcarriers of the at least two sets of subcarrier blocks. The at least two sets of subcarrier blocks are not contiguous in frequency. The block of data symbols are mapped in sequence starting with a first data symbol to the at least two sets of subcarrier blocks and in increasing order of subcarrier index.

## Claims

### Claim 1

A method for transmitting an uplink signal, the method comprising:
transmitting the uplink signal including a block of data symbols,
wherein the block of data symbols are mapped to at least two sets of subcarrier blocks,
wherein each data symbol of the block of data symbols is mapped to one of subcarriers of the at least two sets of subcarrier blocks,
wherein the at least two sets of subcarrier blocks are not contiguous in frequency,
wherein the block of data symbols are mapped in sequence starting with a first data symbol to the at least two sets of subcarrier blocks and in increasing order of subcarrier index, and
wherein each set of the at least two sets of subcarrier blocks includes adjacent subcarriers.

### Claim 2 (depends on 1)

The method of claim 1, wherein each of the at least two sets of subcarrier blocks is spaced apart a certain distance from neighboring sets.

### Claim 3 (depends on 1)

The method of claim 1, further comprising processing the block of data symbols using a transform precoding.

### Claim 4 (depends on 3)

The method of claim 3, wherein the transform precoding is performed using a Discrete Fourier Transform (DFT).

### Claim 5 (depends on 1)

The method of claim 1, wherein the block of data symbols are associated with at least one mobile station (MS).

### Claim 6 (depends on 1)

The method of claim 1, wherein the subcarriers of the at least two sets of subcarrier blocks are orthogonal to each other.

### Claim 7 (depends on 1)

The method of claim 1, wherein a size of each of the at least two sets of subcarrier blocks varies in size.

### Claim 8 (depends on 1)

The method of claim 1, wherein each of the at least two sets of subcarrier blocks is equivalent in size.

### Claim 9 (depends on 1)

The method of claim 1, wherein the uplink signal is generated using Orthogonal Frequency Division Multiple Access (OFDMA).

### Claim 10

An apparatus for transmitting an uplink signal, the apparatus comprising:
a symbol-to-subcarrier mapper; and
a transmitter,
wherein the uplink signal includes a block of data symbols, and the block of data symbols is input to the symbol-to-subcarrier mapper,
wherein, at the symbol-to-subcarrier mapper, the block of data symbols are mapped to at least two sets of subcarrier blocks,
wherein, at the transmitter, the block of data symbols mapped to the at least two set of subcarrier blocks are transmitted,
wherein each data symbol of the block of data symbols is mapped to one of subcarriers of the at least two sets of subcarrier blocks,
wherein the at least two sets of subcarrier blocks are not contiguous in frequency,
wherein the block of data symbols are mapped in sequence starting with a first data symbol to the at least two sets of subcarrier blocks and in increasing order of subcarrier index, and
wherein each set of the at least two sets of subcarrier blocks includes adjacent subcarriers.