Empower Networks with Superior Communication Technology

Introduction

In a rapidly evolving digital world, industries such as telecommunications, wireless communications, and networking are continuously seeking ways to enhance the efficiency, speed, and reliability of their communication systems. Seamless, high-speed data transmission has become the foundation of successful operations, whether it involves connecting mobile devices, transmitting vital data in real-time, or supporting business networks. Our patented communication technology offers an advanced solution to overcome the limitations of traditional systems, providing unmatched reliability and performance for critical communications.

Challenges in Modern Communication Systems

As data traffic increases and more devices come online, communication systems face heightened pressure to deliver faster and more reliable transmissions. Signal degradation, interference, and data bottlenecks are common problems in today’s networks, leading to slower speeds, dropped connections, and inconsistent performance. These challenges are particularly prevalent in wireless communication networks, where signal strength and reliability are often compromised.

Industries require advanced communication solutions that not only optimize data flow but also ensure seamless connectivity, even under heavy traffic conditions.

Why Choose Superior Communication Technology?

Our advanced communication apparatus and method are specifically designed to meet the growing demand for faster, more reliable data transmission. This technology provides a powerful tool to optimize communication systems by enhancing signal strength, reducing interference, and streamlining data flow. Whether used in telecommunications, networking, or wireless communications, this solution improves connectivity and ensures a smooth, uninterrupted user experience.

The technology is easily adaptable to existing systems, making it an ideal choice for companies looking to upgrade their communication infrastructure without significant overhauls. From large-scale telecom networks to personal wireless devices, this communication method provides the flexibility and performance necessary for today’s connected world.

Key Benefits

Optimized Data Flow: Ensures smooth, efficient communication across networks.
Enhanced Signal Strength: Improves signal clarity and reduces interference.
Versatile Application: Suitable for telecom, wireless, and network-based industries.
Improved Connectivity: Offers faster, more reliable data transmission and communication.

Empower Your Network with Superior Communication Technology

Licensing this cutting-edge communication technology provides industries with the tools they need to strengthen their communication systems. Whether for telecommunications, wireless, or networking applications, this advanced apparatus improves performance, connectivity, and user satisfaction, delivering seamless, high-speed communications for the modern digital landscape.

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Abstract
Claims

Modulated signal A is transmitted from a first antenna, and modulated signal B is transmitted from a second antenna. As modulated signal B, modulated symbols S2(i) and S2(i+1) obtained from different data are transmitted at time i and time i+1 respectively. In contrast, as modulated signal A, modulated symbols S1(i) and S1(i)′ obtained by changing the signal point arrangement of the same data are transmitted at time i and time i+1 respectively. As a result the reception quality can be changed intentionally at time i and time i+1, and therefore using the demodulation result of modulated signal A of a time when the reception quality is good enables both modulated signals A and B to be demodulated with good error rate performances.

1. A communication terminal comprising:

(a) a receiving section that is configured to receive a first modulated signal and a second modulated signal transmitted from a plurality of antennas of a communicating party at a same time and a same frequency band,

the first modulated signal being modulated by a first mapping operation of a predetermined modulation scheme, and

the second modulated signal being modulated by a mapping pattern of one of the first mapping operation and a second mapping operation having at least one mapping pattern different from the first mapping operation, wherein:

the first mapping operation and the second mapping operation are operations for mapping a signal point corresponding to a bit set, which comprises a plurality of bits, on an IQ plane,

the first mapping operation maps a first signal point corresponding to a first bit set on the IQ plane, the first bit set being selected from all combinations possible with the plurality of bits,

the second mapping operation maps a second signal point corresponding to the first bit set on the IQ plane,

the first signal point forms a first phase between an I axis of the IQ plane and a line drawn between an origin of the IQ plane and the first signal point on the IQ plane,

the second signal point forms a second phase between the I axis of the IQ plane and a line drawn between the origin of the IQ plane and the second signal point on the IQ plane,

the first phase is different from the second phase,

a first distance between the first signal point and the origin is the same as a second distance between the second signal point and the origin;

(b) a feedback information generating section that is configured to generate feedback information including information related to the mapping operation to apply to the second modulated signal, from the signals received from the communicating party; and

2. The communication terminal according to claim 1, further comprising:

a channel estimation section that is configured to generate a first transmission path estimating signal related to the first modulated signal and a second transmission path estimating signal related to the second modulated signal, using a known signal included in the signals from the communicating party;

a determining section that is configured to output received signal point status information representing a reception status of received signal points on the IQ plane, using the signals received from the communicating party, the first transmission path estimating signal and the second transmission path estimating signal; and

a demodulating section that is configured to demodulate the first modulated signal and the second modulated signal using the received signal point status information.

3. The communication terminal according to claim 1, wherein the signals received from the communicating party are OFDM (Orthogonal Frequency Division Multiplexing) signals.

4. A communication method for a communication terminal, the method comprising:

(a) a receiving step of receiving a first modulated signal and a second modulated signal transmitted from a plurality of antennas of a communicating party at a same time and a same frequency band,

the first modulated signal being modulated by a first mapping operation of a predetermined modulation scheme, and

the first mapping operation and the second mapping operation are operations of mapping a signal point corresponding to a bit set, which comprises a plurality of bits, on an IQ plane,

the first mapping operation maps a first signal point corresponding to a first bit set on the IQ plane, the first bit set being selected from all combinations possible with the plurality of bits,

the second mapping operation maps a second signal point corresponding to the first bit set on the IQ plane, the first signal point forms a first phase between an I axis of the IQ plane and a line drawn between an origin of the IQ plane and the first signal point on the IQ plane,

the second signal point forms a second phase between the I axis of the IQ plane and a line drawn between the origin of the IQ plane and the second signal point on the IQ plane,

the first phase is different from the second phase,

a first distance between the first signal point and the origin is the same as a second distance between the second signal point and the origin;

(b) a feedback information generating step of generating feedback information including information related to the mapping operation to apply to the second modulated signal, from the signals received from the communicating party; and

5. The communication method according to claim 4, further comprising:

a channel estimation step of generating a first transmission path estimating signal related to the first modulated signal and a second transmission path estimating signal related to the second modulated signal, using a known signal included in the signals from the communicating party;

a determining step of outputting received signal point status information representing a reception status of received signal points on the IQ plane, using the signals received from the communicating party, the first transmission path estimating signal and the second transmission path estimating signal; and

a demodulating step of demodulating the first modulated signal and the second modulated signal using the received signal point status information.

6. The communication method according to claim 4, wherein the signals received from the communicating party are OFDM (Orthogonal Frequency Division Multiplexing) signals.

Title

Communication apparatus and communication method

Inventor(s)

Yutaka Murakami, Kiyotaka Kobayashi, Masayuki Orihashi, Akihiko Matsuoka

Assignee(s)

Panasonic Intellectual Property Corp of America

Patent #

7929635

Patent Date

April 19, 2011