# How much bandwidth is available per cell using FDD?

## How much bandwidth is available per cell using FDD?

3.5 MHz

What is the number of channels of a cellular system with an allocated spectrum of 25 MHz and with a channel of 30 KHz bandwidth?

Explanation: Total bandwidth is 30 MHz. And the channel bandwidth is 50 KHz/duplex channel (25KHz*2). Therefore, total available channels are 600 channels (30,000/50). For 4 cell reuse factor, total number of channels available per cell will be 150 channels (600/4).

### How is control channel calculated?

total number of channels available per cell = 660/7 ≈ 95 channels. (c) For N = 12, total number of channels available per cell = 660/12 ≈ 55 channels. A 1 MHz spectrum for control channels implies that there are 1000/50 = 20 control channels out of the 660 channels available.

Which type of antenna is used for center excited cells?

omnidirectional antennas
Normally, omnidirectional antennas are used in center-excited cells and sectored directional antennas are used in corner-excited cells.

#### Why FDD is better for coverage?

In general, FDD is considered better for coverage and TDD better for capacity. Mobile operators are looking to carrier aggregation (CA), which allows them to use multiple sub-6 GHz spectrum channels simultaneously, as a method of increasing the bandwidth and speeds of their 5G networks.

Is 2G a bandwidth?

2G uses channel bandwidth of 200 kHz for voice transmission and 3G uses 1.25 MHz channel.

## How do I find the number of channels?

Find your channel’s user ID & channel ID

2. In the top right, click your profile picture Settings .
4. You’ll see your channel’s user and channel IDs.

What is the cluster size for CDMA?

N=1
What is the cluster size for CDMA? Explanation: CDMA systems have a cluster size of N=1. Therefore, frequency reuse is not as difficult as for TDMA or first generation cellular systems.

### How do you determine the number of channels?

Based on the number of people that talk to each other in a project, you calculate the number of communication channels. We can represent it numerically using n (n – 1) /2 formula.

How can you increase cell capacity?

Cell splitting increases capacity of cellular system since it increases number of times that channels are reused, it preserves frequency reuse plan….There are 3 techniques for improving cell capacity in cellular system, namely:

1. Cell Splitting.
2. Sectoring.
3. Coverage Zone Approach.

#### What is co-channel reuse ratio?

The channel reuse ratio in a cellular system is defined as the ratio of the distance between cells using related channels to the cell radius . If a pair of terminals in two cells are using the same channel, the ratio is called the cochannel reuse ratio (CRR).

Which is better LTE FDD or TDD?

## What bandwidth is 4G?

3G Vs 4G

3G 4G
Frequency Band 1.8 – 2.5 GHz 2 – 8 GHz
Bandwidth 5-20 MHz 5-20 MHz
Data rate Up to 2Mbps ( 384 kbps WAN) Up to 20 Mbps or more
Access Wideband CDMA Multi-carrier – CDMA or OFDM(TDMA)

What is 5G bandwidth?

Speed. 5G speeds will range from ~50 Mbit/s to over 1,000 Mbit/s (1 Gbit/s). The fastest 5G speeds would be in the mmWave bands and can reach 4 Gbit/s with carrier aggregation and MIMO.

### How can I increase my channel capacity?

According to the equation, the only way to increase the channel capacity is to either increase the bandwidth or increase the SNR.

What is signal capacity?

Capacity = bandwidth * log2(1 + SNR) bits/sec. In the above equation, bandwidth is the bandwidth of the channel, SNR is the signal-to-noise ratio, and capacity is the capacity of the channel in bits per second.

#### What is i and j in cluster size?

For hexagonal cells, i.e., with ‘honeycomb’ cell lay-outs commonly used in mobile radio, possible cluster sizes are C = i2 + ij + j2, with integer i and j (C = 1, 3, 4, 7, 9.). Integers i and j determine the relative location of co-channel cells.

What is the maximum number of communication channels?

Example

Number of Persons (stakeholders or team members) Number of Potential Communication Channels
100 4950
200 19900
500 124750
1000 499500