Signals: 5G Candidate

This topic describes the Signal Optimizer's default Favorite Settings for a 5G Candidate signal format.

Signal Information

Waveform Name

Enter an alpha-numeric waveform file name. The name can include spaces and some special characters: _ $ & # + - [ ]. The maximum name length is 22 characters for non-Windows based instruments (e.g., N5182A, etc.), and 150 characters for Windows based instruments. (If you enter a name with more than the maximum name length, the software truncates the name to the length when you click outside of the cell.)

Comment

Enter an alpha-numeric comment of up to 32 characters. The comment resides in the file header and can include spaces and special characters.

Number Of Frames

Enter the number of frames included in the waveform.

Range: 1-300

Over Sampling Ratio

Enter the oversampling ratio of the waveform. The Total Sample Points is automatically determined based on the oversampling ratio.

Range: 2-16

Mirror Spectrum

Enable or disable the mirror spectrum for the waveform.

Sample Points

Display the number of sample points in the waveform. This value is read-only and will be automatically updated with waveform setting change. Waveform length is directly related to the oversampling ratio value selected. (Increasing the oversampling ratio increases the total sample points.)

Signal Length

Display the waveform length in seconds. This value is read-only and will be automatically updated with waveform setting change.

Sample Rate

Display the sample rate of the signal. This value is read-only and will be autotmaically calculated from symbol rate and over sampling rate.

Signal Setup

Modulation Scheme

Select the modulation scheme for 5G Candidates. (Click a choice below for settings descriptions.)

Choices: FBMC-OQAM | UFMC | GFDM | F-OFDM

FBMC Settings

FFT Length

Enter the FFT length used for OFDM transmission. The value must be even. Usually the value is a power of two.

Range: 4 - 16384

Guard Lower Subcarriers

Enter the number of lower guard subcarriers. These subcarriers will be ignored - they will not appear in any results, the modulation and resource type are undefined.

Range: 0 - FFT Length / 2

Guard Upper Subcarriers

Enter the number of upper guard subcarriers. These subcarriers will be ignored - they will not appear in any results, the modulation and resource type are undefined.

Range: 0 - FFT Length / 2

Number of Multicarrier Symbols

Set the number of Multicarrier symbols in a frame, which usually includes preamble symbols and data symbols.

Range: 1 - 2000

Idle Interval

Set the idle interval in-between OFDM frames in seconds. When idle interval is set to zero, a continuous waveform will be generated.

Range: 0 - 200 ms

Initial Transition Cutoff

Set the number of cutoff symbols in the initial transition.

Range: 0 - (K - 0.5)

Final Transition Cutoff

Set the number of cutoff symbols in the final transition.

Range: 0 - (K - 0.5)

Aided Pilot Enabled

Enable or disable the aided pilot for FBMC signal.

System Sample Frequency

Set the signal sampling rate in Hz. All the subbands will share the same sampling rate.

Range: 1 kHz - 4 GHz (The minimum sampling rate is also determined by the total bandwidth of subbands.)

FBMC Filter Settings

Filter Overlap Factor (K)

Set the overlap factor (K) for FBMC signal.

Range: 2 - 8

Filter Bank Structure

Select the filter bank structure for FBMC signal.

Choices: Extend IFFT | Polyphase Network

Prototype Filter (Frequency Domain)

Set the FBMC filter coefficients in frequency domain.

UFMC Settings

FFT Length

Enter the FFT length used for OFDM transmission. The value must be even. Usually the value is a power of two.

Range: 4 - 16384

Guard Lower Subcarriers

Enter the number of lower guard subcarriers. These subcarriers will be ignored - they will not appear in any results, the modulation and resource type are undefined.

Range: 0 - FFT Length / 2

Guard Upper Subcarriers

Enter the number of upper guard subcarriers. These subcarriers will be ignored - they will not appear in any results, the modulation and resource type are undefined.

Range: 0 - FFT Length / 2

Number of Multicarrier Symbols

Set the number of Multicarrier symbols in a frame, which usually includes preamble symbols and data symbols.

Range: 1 - 2000

Idle Interval

Set the idle interval in-between OFDM frames in seconds. When idle interval is set to zero, a continuous waveform will be generated.

Range: 0 - 200 ms

Initial Transition Cutoff

Set the number of cutoff symbols in the initial transition.

Range: 0 - (K - 0.5)

Final Transition Cutoff

Set the number of cutoff symbols in the final transition.

Range: 0 - (K - 0.5)

Aided Pilot Enabled

Enable or disable the aided pilot for FBMC signal.

System Sample Frequency

Set the signal sampling rate in Hz. All the subbands will share the same sampling rate.

Range: 1 kHz - 4 GHz (The minimum sampling rate is also determined by the total bandwidth of subbands.)

Subband Configuration

Subcarrier Start

Set the subcarrier start index of subband configuration, the subband subcarrier end is coupled after it changes.

Subcarrier End

Set the subcarrier end index of subband configuration, the subband subcarrier start is coupled after it changes.

Subband Size

Set the number of subcarriers for each subband, the subband end is coupled after it changes.

Number of Subbands

Set the number of subbands, the subband end is coupled after it changes.

Skip DC

Set if DC is skipped between subbands. It is editable when DC is on the edge of subband, otherwise it is set to No and readonly.

Choices: Yes | No

Subband Filter

Filter Type

Select the UFMC Filter Type.

Choices: Chebyshev window | User Defined

Length

Set the length of the filter in symbols.

Range: 1 - 1000

Sidelobe Attenuation

Set the sidelobe attenuation of Chebyshev window in dB.

Range: 0 - 200

Bandwidth (-3dB)

Display the normalized 3dB bandwidth of filter and the number of subcarriers covered.

Filter Coefficients

Set the filter coefficients for user defined filter.

GFDM Settings

Number of Subcarriers (K)

Set the number of subcarriers for the GFDM signal. This value will be clipped to the nearest power of 2.

Range: 4 -16384

Guard Lower Subcarriers

Enter the number of lower guard subcarriers. These subcarriers will be ignored - they will not appear in any results, the modulation and resource type are undefined.

Range: 0 - FFT Length / 2

Guard Upper Subcarriers

Enter the number of upper guard subcarriers. These subcarriers will be ignored - they will not appear in any results, the modulation and resource type are undefined.

Range: 0 - FFT Length / 2

Number of Subsymbols (M)

Set the number of subsymbols for the GFDM signal.

Range: 1 - 2000

Cyclic prefix (CP) Length

Set the cyclic prefix (CP) length (Before oversampling).

Range: 0 - K*M/2

Cyclic suffix (CS) Length

Set the cyclic suffix (CP) length (Before oversampling).

Range: 0 - K*M/2

Initial Transition Cutoff

Set the number of cutoff symbols in the initial transition.

Range: 0 - (K - 0.5)

Total Frame Length

Display the total frame length including CP and CS (Before oversampling).

Idle Interval

Set the idle interval in-between OFDM frames in seconds. When idle interval is set to zero, a continuous waveform will be generated.

Range: 0 - 200 ms

System Sample Frequency

Set the signal sampling rate in Hz. All the subbands will share the same sampling rate.

Range: 1 kHz - 4 GHz (The minimum sampling rate is also determined by the total bandwidth of subbands.)

Pulse Shaping Filter

Filter Type

Select the GFDM Filter Type.

Choices: Raised Cosine | Root Raised Cosine | Xia 1st | Xia 4th | Rectangle

Roll-off (alpha)

Set the Roll-off parameter of GFDM filter.

Range: 0.01 - 1 (Set to 0 if the filter type is rectangle.)

Window Settings

Window Type

Select the GFDM Window Type.

Choices: Rectangle | Ramp | Raised Cosine | 4th Raised Cosine

Ramp Length (Nw)

Set the ramp length of GFDM window.

Range: 0 - FrameLength / 2

F-OFDM Settings

Min Subcarrier Spacing

Set the minimum subcarrier spacing across all the subbands. This property will be automatically updated with the equation: Min Subcarrier Spacing = Sample Frequency / Max FFT Size.

Idle Interval

Set the idle interval in-between OFDM frames in seconds. When idle interval is set to zero, a continuous waveform will be generated.

Range: 0 - 200 ms

System Sample Frequency

Set the signal sampling rate in Hz. All the subbands will share the same sampling rate.

Range: 1 kHz - 4 GHz (The minimum sampling rate is also determined by the total bandwidth of subbands.)