Granted Patent B2

US 12,562,758 · App. 18/191,309 · Granted Feb 24, 2026

Inventors: Qinghui Wang (Shanghai, CN); Wei Ruan (Shanghai, CN); Xuqiang Shen (Shenzhen, CN)

Assignee: HUAWEI TECHNOLOGIES CO., LTD.

H04B1/0064H04B1/38

Abstract

Claims (147)

1 . A Bluetooth chip, comprising:

a first Bluetooth radio frequency channel coupled to a first antenna;

a second Bluetooth radio frequency channel coupled to a second antenna; and

a Bluetooth baseband coupled to each of the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel, and configured to:

receive a signal transmitted by a transmitting device through the first Bluetooth radio frequency channel and a signal transmitted by the transmitting device through the second Bluetooth radio frequency channel, and

combine the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel based on signal quality of the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel;

wherein the Bluetooth baseband is configured to combine the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel comprises the Bluetooth baseband is configured to:

determine a weight of the first Bluetooth radio frequency channel and a weight of the second Bluetooth radio frequency channel based on the signal quality, wherein a Bluetooth radio frequency channel with better signal quality has a larger weight, and

combine the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel based on the weight of the first Bluetooth radio frequency channel and the weight of the second Bluetooth radio frequency channel.

2 . The Bluetooth chip according to claim 1 , wherein the Bluetooth baseband is further configured to:

obtain a time delay and a phase difference between the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel;

perform, based on the time delay, time alignment on the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel; and

perform, based on the phase difference, phase alignment on the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel.

3 . The Bluetooth chip according to claim 1 , wherein the Bluetooth baseband is configured to combine the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel based on the weight of the first Bluetooth radio frequency channel and the weight of the second Bluetooth radio frequency channel comprises the Bluetooth baseband is configured to:

combine, according to the formula

SNR

=

(

∑

i

=

1

N

⁢

(

w

i

*

S

i

)

)

2

∑

i

=

1

N

⁢

w

i

2

*

N

0

,

the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel, wherein

w i represents a weight of an i th Bluetooth radio frequency channel, S i represents signal energy received through the i th Bluetooth radio frequency channel, N 0 represents noise intensity, and N represents a quantity of Bluetooth radio frequency channels.

4 . A signal receiving method for a Bluetooth chip, the method comprising:

receiving a signal transmitted by a transmitting device through a first Bluetooth radio frequency channel of the Bluetooth chip;

receiving a signal transmitted by the transmitting device through a second Bluetooth radio frequency channel of the Bluetooth chip; and

combining the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel based on signal quality of the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel;

wherein combining the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel comprises:

determining a weight of the first Bluetooth radio frequency channel and a weight of the second Bluetooth radio frequency channel based on the signal quality, wherein a Bluetooth radio frequency channel with better signal quality has a larger weight, and

combining the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel based on the weight of the first Bluetooth radio frequency channel and the weight of the second Bluetooth radio frequency channel.

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

obtaining a time delay and a phase difference between the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel;

performing, based on the time delay, time alignment on the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel; and

performing, based on the phase difference, phase alignment on the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel.

6 . The signal receiving method according to claim 4 , wherein combining the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel based on the weight of the first Bluetooth radio frequency channel and the weight of the second Bluetooth radio frequency channel comprises:

combining, according to the formula

SNR

=

(

∑

i

=

1

N

⁢

(

w

i

*

S

i

)

)

2

∑

i

=

1

N

⁢

w

i

2

*

N

0

,

the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel, wherein

w i represents a weight of an i th Bluetooth radio frequency channel, S i represents signal energy received through the i th Bluetooth radio frequency channel, N 0 represents noise intensity, and N represents a quantity of Bluetooth radio frequency channels.

7 . A Bluetooth communications apparatus, comprising:

a first antenna;

a second antenna;

an application processor; and

a Bluetooth chip coupled to the application processor, and comprising:

a first Bluetooth radio frequency channel coupled to the first antenna;

a second Bluetooth radio frequency channel coupled to the second antenna; and

a Bluetooth baseband coupled to each of the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel, and configured to:

receive a signal transmitted by a transmitting device through the first Bluetooth radio frequency channel and a signal transmitted by the transmitting device through the second Bluetooth radio frequency channel, and

combine the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel based on signal quality of the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel;

wherein the Bluetooth chip is configured to demodulate the received signals and send demodulated signals to the application processor;

wherein the Bluetooth baseband is configured to combine the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel comprises the Bluetooth baseband is configured to:

determine a weight of the first Bluetooth radio frequency channel and a weight of the second Bluetooth radio frequency channel based on the signal quality, wherein a Bluetooth radio frequency channel with better signal quality has a larger weight, and

combine the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel based on the weight of the first Bluetooth radio frequency channel and the weight of the second Bluetooth radio frequency channel.

8 . The Bluetooth communications apparatus according to claim 7 , wherein the Bluetooth baseband is further configured to:

obtain a time delay and a phase difference between the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel;

perform, based on the time delay, time alignment on the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel; and

perform, based on the phase difference, phase alignment on the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel.

9 . The Bluetooth communications apparatus according to claim 7 , wherein the Bluetooth baseband is configured to combine the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel based on the weight of the first Bluetooth radio frequency channel and the weight of the second Bluetooth radio frequency channel comprises the Bluetooth baseband is configured to:

combine, according to the formula

SNR

=

(

∑

i

=

1

N

⁢

(

w

i

*

S

i

)

)

2

∑

i

=

1

N

⁢

w

i

2

*

N

0

,

the signals received through the first Bluetooth radio frequency channel and the second Bluetooth radio frequency channel, wherein

w i represents a weight of an i th Bluetooth radio frequency channel, S i represents signal energy received through the i th Bluetooth radio frequency channel, N 0 represents noise intensity, and N represents a quantity of Bluetooth radio frequency channels.

Assignments (1)

Continuity (2)

References Cited (16)